Not giving me credit after they have overcharged m

On 25th October we rented the movie Life of Crime online. We were charged 3 times for the same movie. We called and did the live chat and were promised that our account would be debited with the amount incorrectly charged within 48 hours. This did not happen. After numerous phone calls during which we were promised that the money will be refunded within 24 hours, nothing has happened yet. Then we were promised on facebook chat that it's now fix. It is not. Called the call centre again, promised it was fixed. NOT. Just called again and the call centre agents said NOBODY THERE KNOWS HOW TO FIX THE PROBLEM!!!! Listen, You should have it on tape! Also check the numerous emails and facebook inbox messages. USELESS!!! Who should pay for the literally almost 6 hours I have spent on the phone trying to sort out this mess??? Will it be deducted from my account?!