Bad service and false accusation

On Saturday the 5th of June 2021 I went with a client who i wanted to install a decoder for to buy an Ovhd decoder at Pick n Pay Family (Appiance shop) in Queenstown. I went to use the atm while my client went on to buy the decoder inside the shop. Upon entering my car i noticed that the seal on the box seemed to have been tampered with & i asked my client if he had opened the box to check if all the contents inside the box where in order & he said no. We then opened the box & found that not only were the contents not in the plastic they also weren't brand ie they both had scratches. We then immediately took the box back to the shop & when we arrived in the shop we asked the lady who had sold it to us to open it & check which she did & i asked her if the items looked new then she said no & called her superior. She explained everything to him & his response was,'this is weird'. He then went to the shelf were the decoders are packed, took one showed us one sealed box then opened it & compared the two then found that the one he took from the shelf was fine. He then called his manager, explained the situation to her & she said its the first this was the first time they experienced such a problem. She then left to the other Pick n Pay (grocery shop) to check how many Ovhd decoders they had received & instructed the supervisor to check the number of returns he had received. She then came back & said that she had called the Appliance store manager to come sort out the issue. After a good 20min the store manager, Danilla Goliath, came & the supervisor explained the situation to her to which she also responded that this had never happened before. After their discussion she then approached me & i also explained to her what had happened. She also said this had never happened before & i asked her what she was gonna do about it to which she responded that we might've swapped the units so she couldn't help us. I asked her to check the serial number as well only to discover that they didn't match as well. I asked her to sort it out to which she refused saying that it wasnt their store's fault. I then rep**** saying it was their fault as they're supposed to check the contents with the customer before they leave the store & she said that wasn't necessary then she kept insinuating that we had swapped the decoders. We argued back n forth & i insisted that she check the video footage of when we left the shop & went back to my car. She refused & said there was no use in doing that, which is very strange. We continued arguing about checking the footage then i suggested that she gets security to come search my car to which she also refused. I asked her how we were then going to solve the problem cz clearly we were now the ones who were in the wrong. She then said we should come back on Monday the 7th when her boss is around so we can solve the problem to which i responded 'how will it help if you're refusing to search my vehicle before i leave then if i come back on Monday you might turn around & say i took the decoder home'. She then agreed & got a security officer from Red Guard plus the store supervisor to come search my car. I opened all doors & the bonnet for them to search & after a thourogh search they found nothing. We then went back to the store, the security officer & the store supervisor reported to Danilla that they found nothing. I asked her to please refund or replace the box as they had not found anything but Danilla said we must call Open View HQ to sort out the matter for us but i refused as i bought this from them so they should should sort it out with Open View. Danilla then said she couldn't help us & we should come back on Monday when her boss is then. We left the shop with out the unit. I then returned to the shop on Monday with my client, handed my receipt over to Danilla who the took the tampered unit they had sold us & a new unit from the box & went to show her supposed boss only to return a few minutes later saying that she couldn't help us & wouldn't give us a refund. My client then got fed up & was forced to buy another unit. We insisted that they check the box before we left the shop to avoid this situation happening again. Im appalled by their service & how they treated us like ********* when it was clearly their fault. Judging from the responses i got from Danilla from the beginning & the boss not even bothering to come talk to us it shows that they weren't willing to help us. They failed to make follow ups on the matter in order to get to the bottom of the situation. Now my angry client is stuck with that old decoder & has lost R700 of his hard earned cash.