Customer Service Non Existent at Foto First Fourways Mall

My daughters bought an Instax camera on Saturday, 14th September 2019 late in the afternoon. We stayed at the mall for a few more hours then went home where they put the film in and started to snap away. We knew how these cameras work as their friends have them. The one camera was working fine for the first 4 pictures and then it started taking blank pictures... the exposure was on indoors where they were taking and the flash was on as it would be automatic and took 3 pictures that were blanks after that. The last 2 blanks that were taken got stuck whilst coming out... so we left it, switched it off then turned it back on, then it loosened and came out. We thought it might be the film as it was a pack of 10 which came with the camera as they were on special. So we took the film pack out and put it into her sisters camera, she took the picture and it took the picture, no problem. At this stage I was irritated as this should not be happening with a brand new camera at R1000. So we returned to the store at Fourways Mall and said the guy could he please exchange as there's a problem and it wasn't even 24 hours old. He gave us every possible excuse under the sun to why it got stuck or why it was blank blamming it on my daughter. I told him, he is wrong... then he proceeded to take 3 x shots (the last 4 x shots) in her camera... the first one came out blank, he blammed it on not having it on the correct exposure... i'm sorry, but it's automatic.... he finished her pack of film which costs R19 per piece.... i told him he should replace them and he said no, he was testing it... 2 of the 3 pictures he took worked. Today, she said when she turned it on, all the lights were flashing on the device and i recall correctly that the man who assisted us on Sunday, 15th Sept, said if that happens, there is a problem and it's faulty. FOTO FIRST, your customer service SUX. Both my daughters bought new packs of film on Sunday after buying the device on Saturday and the man at Foto First couldn't even give my daughter a complimentary pack????? How is this customer service???? There is something wrong with my daughter camera and i would like an exchange please as this is not acceptable, we took it back the day after purchasing as there was definitely something wrong, but was told there's nothing wrong.