MTN sucks

I have been with MTN since 1995. 4 years ago, I ‘upgraded’ my contract which in reality was a major downgrade. After numerous attempts to get this rectified, I gave up. Last week they called me to upgrade my Data contract. I did the telephone thing with a lovely young lady who was very helpful. Then I received an SMS to say my credit checks had started. Shortly thereafter they sent another SMS to say my check had been suspended due to documents that are required. I must contact my agent. No phone number, no indication of which documents are required. Now an MTN agent phoned me. I have no idea how to contact her. I tried the number they gave but that was a complete waste of time. No option to speak to a human and no option to deal with my issue. Thank you MTN for a disgusting lack of service.