Disappointed in the service from FNB

I signed up for a 7-day-free trial of My Family Cinema but the full amount was deducted immediately. I immediately phoned FNB to dispute the transaction. They assisted me over the phone to log a dispute. This was the 5th of July. Ever since it has been back and forth with FNB to reverse the transaction. They asked for a cancellation letter from my side but there is no option to cancel the subscription to My Family Cinema as you can only choose to not renew after a year. I've sent screenshots of the payment that went through and that my subscription has expired but still no help from FNB. I have spoken to numerous FNB agents and I have to tell the same story over and over again, just to start all over again. This is truly unacceptable. I'm very disappointed in the way this was handled by FNB.