Bad service from MTN and Supersonic

I've been using this subsidiary company from MTN for about a year, every month I log issues with bad connections and slow connections. Last month my wifi went off in the first week of the month. I reported it via the correct Chanel only to be told there was an issue with an MTN tower in my area. Today I get a message that it's sorted out and they closed the query. I checked and it's still exactly the same no wifi, I was billed yesterday and to date paid R800 and still no wifi. Surely the technical department of this company can't be that *********** to close a query before its sorted out. I've had bad service from day 1 with this company. I'm canceling my wifi because of the service I recieved. Supersonic and MTN if you want to verify this statement to my logged issues my account number is SS***.