pathetic customer service

What pathetic customer service you cant get hold of no one. The customer care line gives you options to select then when you select the option you want the computer just says goodbye and the phone goes off. I am sitting and paying for a contract that I cannot use I am getting bills that I don't know what I am paying for. My sim has been Rica barred from the first day I received the sim. What should I do stop paying until they call me to pay my account I think that will be the quickest way to their attention