Disgusted with Vodacom advance repairs service

I have sent my iPhone 15 pro (job no ***5 ) into Vodacom repairs in canal walk then they sent it to Vodacom advance repairs in Johannesburg , my phone came to Cape Town after a week and I still had problems with my device ,I booked it in again the following day and my phone came back today even worse ,I can’t even get into my phone ,I’m am absolutely disgusted in the service of Vodacom advance repairs , I’m sending this phone again back to them tomorrow for the third time , it’s been 3 weeks that I’m without a phone and I do all my work on my phone , what a waste of time !!! Instead of swapping the phone out for a different device they keep sending this one back and it still gives problems