OPPO A40 turning POPO at Vodacom

Worst experience ever... I bought an Oppo A40 at Foschini Cape Gate last year. Within 6 months the phone went in for repairs thrice. The forth time the phone went in for repairs it was replaced with a new device. Now the phone gave problems again, and sitting with Vodacom repairs for two weeks and they ant to replace it again. This POPO brand simply do not work for what I need it for being a bookkeeper that needs to do authentication via the phone to access certain platforms.

Vodacom, please give me store credit to enable me to upgrade the phone soonest My work deadline is the 7th, and I need to submit my work this coming Friday.