MTN worst service provider

If I could give mtn customer care a zero rating I would do that. I opened a new contract for data beginning of February, I was told I can transfer the contract to my number, which I did once I had received the sim card. It took a month for mtn to transfer the contract to my original number as if that was not enough, since Thursday 10 March after doing the swim swap I could not receive phone calls and its been 4 days without today Monday 14 March in the morning I have spoken to more than 10 consultants at MTN and noone seems to be able to assist me. I have asked them to cancel my contract and they are telling me about 30days so how am supposed to stay for 30days without recieving calls. MTN is the worst service provider.