Poor communication at MTN.

I have been a long time MTN User. I had the MTN Home WIFI. When I Cancelled it at the end of July. I phoned the call center, they said I need to return the modem to my closest MTN Store. Which I did. Now more than month later I find out that is has not been cancelled. This is poor communication on the side of MTN as I will be reversing any debt from my account for this Home WIFI account and will be insisting that MTN pays for the cancelation cost that I will in cure from reversing the debt. If this carries on. I will be looking to change my Cell service provider. I have been with MTN since 1996 and still have the same number from then. So me wanting to change shows how ****ed off I am!