Mondo MTN sells faulty phones

i bought a phone with MTN through Mondo on the first of November and the contract was approved and the iPhone 13 128GB was delivered around the 8th of November.

I loved my phone at first but about a week ago it started echoing horribly whenever i receive notifications. 2 days ago the phone started overheating for no reason and today I wake up without a phone because the thing will not restart, I cannot do anything on the screen.

Does your company just sell toys that you can use for a month and a half then start experiencing issues.

Now I am left without a phone I cannot call anyone I cannot receive any calls which means in case of emergencies I have no way of contact. This is absolutely disgusting to deliver a faulty device. Now i have to go through an entire process of sending the phone back and waiting for it to be fixed, meaning all this time i will not have a working phone.