Faulty device

I upgraded my contract and gt myself a Samsung S22, nonetheless 5 months into the contract the phone started overheating and the battery was getting drained when this happend. 12 months later I sent it into the repair centre and was told that I needed to pay in an amount of R1200. Payment done, called in and was told that the device was booked in for another problem and was told that problem was covered under the warranty. The phone was returned to me, within 2 days of use the device the phone started to do the same thing yet again. The phone was again booked into vodacom galleria branch on the 01 Dec. I called vodacom repair centre to findout wat was happening with the device and was told that it was sent back to the store. Went in to collect it they still dnt hav the device. When I enquired about what was going on I was told that they can not find the actual fault. So I was sold a faulty device on the onset and I am being given the run around, it's now the 19th of Dec still no device. If the fault can not be resolved I do nt want the device back. I still hav 24 months remaining for this contract and I am sitting with a faulty device. This is so so so disappointing.