Who I have the same questioned this topic

When I first started my plan with them, I told them that I do not want access to make international calls. Recently, however, one of my employees accidentally called internationally and it is charging me $81.67. They are charging me for a service I told them to cancel. I cannot find anywhere to complain other than here, so I'm writing here. Please help me find a proper way to complain and get my money back.