bad service for something I pay everymonth

At this point and time I am so ****ed and fed up with Barnetts service, I took my tv there on contract or monthly installment and on the 4th June 2015 I took it in because it just went dead on me. Even now its still hasn't come back and when I request a refund for the money that they took this month for something I don't have they telling me that they cant refund me because my TV is still in for repairs...what am I paying for because that tv is not with me and they are quick to take the money from my bank account but are failing to fix things, I took it there earlier so it can come back earlier what the hack am i suppose to do without my tv and I wasn't even given a temporary tv to watch that is *** service that's definitely not customer care and I'm ****ed off..I called them to check on my tv but im being told about a part that hasn't arrived im fed up to a point that I want to cancel the whole account, they might as well keep the damn tv and give me all my money back.im being taken from pillar to post for something I pay for. I am done and tired I have called, I have sent emails and I have been promised a new tv and still nothing and they will still deduct their money