POOR CUSTOMER SERVICE #TELKOM

I upgraded my contract last year amd got a Samsung A31 ( worst mistake ever ) within 10 days the phone had a crack on the back ....took it back to the shop,they booked it in for repairs. A guy from the repair centre called me an d told me that i needed to pay R800 and I asked guy to send me an email stating what the money would be for ,what are they going to repair to the phone as it was new ,to this day I have not received anything. They continue debiting my account ,how can I pay for something I don't have, not even using their sim.The consumer service at this place is non-existent (Norwood Telkom Store ). Last year August I renewed my cellphone contract . I took a Samsung A31 which had a bump on the back ,I then took the phone to the store on the 10th day. They took the phone in repairs, I got a call from their repair center indicating that I need pay around R800 ,of which Iard. Every month I have to go check and always they tell me they can't get hold of the repair center nor track the phone. I just want to cancel the contact and go elsewhere, you can keep the phone.