Cancelling a fully paid contract is a struggle

I have been trying to cancel my contract since beginning of November 2015 and have been told that someone will contact me, till this day nobody has contacted me and I still get the deduction every month seemingly nothing is done to address the issue, I have been to the stores and they are telling me the same sick story that someone will contact me to cancel my contract. How long must a person wait??? Am I ever going to receive help. PLEASE CANCEL MY CELLPHONE CONTRACT