Fed up with cell c

I am really fed up with cell c. I got a new contract with then in march. 2 weeks ago I asked for a number swap as I did not want to use the new contract number but wanted to use my old prepaid number instead for the contract. Since that number swap was done I can't receive any incoming call nor can i get messages. For the past 2 weeks i have been calling cell c customer service and technical team to resolve this issue but all I get is the same instructions to follow even though I have already tried everything. With every call I also get a new ref number. 2 weeks and no one at cell c can help me. This is unacceptable. I can't receive calls or messages for 2 weeks and now cell c dont reply to my emails anymore. But yet they expect me to pay for.my contract at the end of the month.