Not Happy with MTN

So i had taken up a mtn home wifi which came to an end in April 2025 , i then went to MTN Eastgate to close up that contract and took a Shesha month to month for R399, which i was getting 300gig normal internet and 300gig fpr lower speed internet , which worked fine for the first 300 gig then the remaining 300gig lower speed did not work at all , i then called mtn to get this fixed noone was able assist me , i then went to the store and they advised that they cannot assist with coverage . Fine i then left it , month end came i was billed over R600 for the cancelled contract that already came to an end not sure why when i checked they advised it was not canceled so in other words mtn thought it was okay to bill me for 2 routers i der the same address ??? Fast forward to a month later where the internet was giving me problems now with the 300gig high speed, it did not connect at all , thats when i tried getting hold of them and they told me that i no longer have coverage in my area , so for the past 2 months mtn has been debiting my account for the Shesha deal which i no longer available in my Area and i cannot use their data but i am still being debited , on top of that it has increased from R399 to R419 and i dont know why untill now i still dont have coverage.

I need to know from MTN why is the coverage not available in my area ? Why was i not notified that there is a possibility that the coverage will not be available in my are . I need to be refunded my money from the time the coverage was not available in my area until now .