Pathetic service

I have been trying to upgrade. Yet the legal department says I'm in arrears with my account since 2015. I phoned to find out and customer care says im not. I know I am not in arrears. I upgraded one line in january how would it be possible to do that if I was in arrears. So the phone for the legal department does not get answered. The rest of the departments cant help. This is my second review and nobody contacted me yet. Cellc has pathetic service. I seriously consider to cancel all four my contracts.