Services Suspended for the past month, yet account up to date

After phoning MTN on 8th June for a contract cancellation quote, my account has been suspended, i cannot check airtime, place calls or even check my airtime, i have phone customer care over 10 times still has not been resolved, have been to MTN Richards Bay store on the 5th of July, still not resolved, my account is up to date yet no one can fix it. Tired of switching my phone off/on from the service champion. and still awaiting feedback from a supervisor. This is dismal as I am on an MTN Business Contract. Poor service. what's the point of having airtime when i cant use it for the past month & yet i have been billed???