Terrible after sales service from Hisense South Africa

I bought a Hisense fridge in January 2020.It started heating up in December 2022 and I logged a warranty claim on 22/12/2022. After many phone calls they eventually sent a repair team out in February 2023. The repair team claim they repaired the fridge,but nothing has changed,it still heats up and the freezer part eventually unfreezes, causing us to lose all our food… I phoned Hisense again to ask them to Please send out the repair team again but nothing is happening.I find the after sales service absolutely unacceptable.