MTN Suspended number

Afternoon, I have my contract with MTN for many years. And till last year there was not 1 problem regarding my account. Since last year it felt like they need a person to make a mess on the account. For a few months after I got hold of an agent/person the explain the mess they made it was corrected. But just afterwards it started again, every time you phone say for instance after 5 their system is off I need to phone back. 2nd time phoning back their still off(what a joke). MTN also doesn't let their clients know that certain information is going to change they just change it. When payments were made they are to lazy to look or search for it on the statement and when the phone is suspended and you call and they ask which ref nr you used then the old one was there and now I have to use the new one, why? If you know phone the number 135 you hold on for 8 min before you can choose the correct number for your query. When asked for information regarding the changes I was told that they don't have any of those information because they just work there. Isn't it the MANAGERS work to see that certain information is available for the people that work there?? Every time I have to upgrade then not one of the agents tell of inform me if you pay by eft that you have 21 day to pay the account. They have change the date when statements go out and the reference for payment. I think my next step is to go on pay as you go because MTN is going backwards.