MTN the careless provider

The MTN store in Canal Walk sold me a device cash in March 2023. It hasn't even been 6 months and the phone is giving my problems. Firstly, their customer care line says I need to go back to the branch I bought the device from. This is inconvenient especially you don't live in the area or province. I finally get to the branch, wait 45 minutes to get service and they tell me that they need to book it in for 7-14 days without an alternative device. So they give me a faulty device and then further punish me by wanting to take the device that I need to use to even leave the actual mall and go home. The dismissive agent tells me that the person who sold me the device should have told me how it works. What a terrible service provider that doesn't care about it's customers. I'm still so mad