Phone sent to repairs more than three times

I bought a contract phone from Blue label connect, it was a ZTE Blade. I never enjoyed having this phone. After using it for almost 7 months it switched off by itself and never switched on and I reported it to blue label who took it back and replaced it. Apparently the replacement phone also did the same and I still reported the phone and they did replace as usual with similar phone and again same story happened now I have returned the third phone and I did not receive and feed back since November 2024 and it's been 3 months without a phone. And upon enquiring They keep telling me they are waiting for feedback from repairs. I am paying for this phone every month without fail. But the service is super bad.