Cell C keeps disconnecting my line after I have paid it

Acc Nr *** Mr J van der Berg I am urgently seeking help with the accounts department to reconnect my line that is paid in full, no money is outstanding. Every month I go into Checkers and pay my Cell C account at the Money Market. Every single month my phones are cut, I end up sending the proof of payment numerous times, I have to find a way to call to follow up and this is extremely hard as I do not have a phone I can use when this keeps happening. My wife runs her own small business and is loosing clients because she can't call them or they can't get hold of her. I am trying my best to find more suitable employment and without a phone this is proving my task impossible. I don't know what more to do, every month I have the same stress and every single time Cell C just says they are looking into the matter. I phone Customer Care on 084135 and proof of payments are sent to ***