2 out of 3 devices failed shortly after repairs

We have had 3 devices repaired, an Apple watch 4, Iphone 6 and an Iphone 13. The apple watch had a logic board replaced and after 2 months the whole screen separated from the body. The Iphone 13 OEM screen lasted 4 months, the touch functionality has now stopped, and warranty is only 3 months. So 2 out of 3 devices repaired by them have failed shortly after being repaired. And in order to send the devices back for inspection, is R500 if you dont want to proceed with the repair.