Can you sort this out or please cancel my contract

Last year i layed a complain about you guys putting my name in the mud while i pay you correctly.<br> I spoke to you and till today you never got back to me , I thought you guys sorted out the issue of removing my name on credit bureau, till I went to Mtn The glen mall to open a new line and you guys declined it.<br> I really hate your service MTN , can you cancel my contract if I'm not gonna get the help I need.