Poor service and unprofessional staff

Good day. I was at your south gate branch this morning 26/05/2022 I'm not 100% sure of the time I walked into the store but my purchase time on my receipt is 11:36:47. I was assisted by a lady called Lungile who first told me that that she didn't has the key for the safe where the tablets are kept and the person who has the keys is off, only once I explained that I was from trade route mall where I was told they only had a display tablet and that they don't know when they will have stock but I should rather go to south gate because the had six tablets available and that i was not gonna be driving back and fourth than she said she will go check at the back if they has. The problem started after she came back with the phone and took me to the till to make payment, she and another lady by the name of Vidah who was by the tills assisted me. I explained that I has two vouchers I would like to use as part of payment. She explained that I am unable to use the vouchers for a phone purchase which I fully understood. I was than told that i would use the vouchers to make a payment on my account and I opted for that, they punched in both vouchers but the system said I was unable to redeem them with that option, They suggested that I rather buy items in the shop and I agreed to that. I than went and choose a few items than went back to the till to pay for the items now the vouchers says they have already been used. Vidah called a lady by the name of Lebohang who I assume is the manager however I'm not sure about that. Lebohang took my Id and the reference of the voucher and called to call the head office, My issue is that Lebohang was not professional at all, she was playful and moving for here to there and didn't even try to give me a solution, I was in the store for more than an hour and a half bear in mind I am heavily pregnant and I wasn't even offered a seat. I left the store at around 12:30 with no resolution what so ever and I never used the vouchers. The voucher code is *** please investigate when and where the voucher was used because I am sure that if it was really used it will sure todays date ,southgate branch and the time of my purchase because those ladies punched it into the system more than twice