Failure to fix tv and return deposit

I took my tv set(Samsung) for repairs at Tv Tronics in Brits-NW.Two weeks later they called me to let me know that the issue with the tv is due to the faulty Led light,I was asked to pay for the deposit before they can carry out the repair, to which I paid immediately. A month went by without any update and when I enquired,I was told that they are still waiting for the part they ordered from the Samsung supplier.Another month went by and still no news. I finally told the owner of Tv Tronics that I want my tv and deposit because he said the supplier has still not supplied the part he ordered.Louwjie,who is the owner is now giving me the run around with my deposit and he is now telling me stories about the supplier who has still not returned the money or as his wife recently told me that they have cash flow problems.I just want my money back sincewell they failed to fix my tv.