Phone service cut - I am Highly Disappointed.

I need to know something, because on the call centre no one can assist with this. If Mtn cut my line, how am I supposed to use it for my client's who need to pay in order for me to be able to pay my contract. My phone is inactive, I have missed NUMEROUS calls, most I do not know of because my incoming service is cut, why go to that extent?? I feel like I need to be afforded a payment plan to settle this bill so that my line can be re-opened! I am extremely disappointed, I am almost due an upgrade but I do not feel the need with even going for it because I have always battled with MTN, very difficult to make money with a phone that is useless!! I request a payment and my line re-opened as I start honouring the payments. The person who will be handling this query won't even be able to call me for my complaint because I do not get any calls! This has crippled my business largely, I lost potential clients over this because people used to call for my services! This is a serious matter and I would not want to take this to the Ombud. Please assist and re-open the line.