Very poor Service

I have been really frustrated by MTN for the past 3 months. I have two contracts with them and both of them I pay by debit order and never paid cash or EFT since I had a contract with them for the past 15 years. One of the contracts, I get suspended every month and have to phone them to fix the debit order every month because they did not put through the debit order. Every time I call them it takes more than 30 minutes to get someone to reply/talk to you or I have to make 5 calls before my problem is sorted out. There is really serious incompetence within MTN. I cannot phone every month to get reconnected. Sometimes you call, they pick up the call and don't talk to you and hear people talking in the background. This is really disappointing and frustrating. I am thinking of cancelling both my contracts and move on.