Fix phones to last for 3 months only

CWSA259609- so weFix fixed our phone to last only for 3 months, then it stopped working. 3 months is their repair warranty, I took it back to them and they charged me again R1400 to have it fixed, they refused to fix the phone on their expense. I would expect that kind of service from an informal store that usually stand on the train station or on a plaza, but not from a store situated in one of the biggest malls in the world. I will never use weFix or reccomend them to anybody.