No Service & Haven't be able to get assistance for 4 Days!!!!

My account has all of sudden been suspended. For no reason. I have sent several email, been in to two different MTN Stores, none of the people assisting can sort it. They say payment are up to do date, I am RICAed and all is in order, however I cannot make phone or use my Data, the first consultant that helped me told me account was in arrears, I immediately settled two months on credit to try fix it, only to realise when I checked that my account was in good standing and all debit orders have gone through, so now have paid two months in advance and cannot get anyone to help me reactivate my service or process a refund. I am on the road a lot and really need my phone for business, and I haven't been able to use my phone when not on WiFi for 4 DAYS! The service levels are shocking!