Blue label connect poor service

I have been trying to get hold of them but their line keeps saying it's busy. I called the head office and the lady that answered says if the line is not going through there's nothing she can do. I felt like now it means they want to keep deducting money from me without me getting the service I need. I want to cancel the phone contract I have with them. ***. I javelin been calling this number for 2 weeks now and it's not going through.