Bad service and won’t give me my money back for work not done

After so much drama last week, I finally received a new unit on Friday adternoon 5pm! They still haven’t deinstalled the tracker from my old car and clearly they won’t! BUT THEY REFUSE TO GIVE ME MY MONEY BACK FOR THE WORK NOT DONE OF DEINSTALLING AND REINSTALLING!!! spoke to Ayanda in queries and she gave me such attitude because how can I won’t my money back even if they put a new unit in my car!!! Fact is I paid for a service that was not done!!!! And then to top it off, she put the phone down on my ear after confronting her about her bad attitude!! I have never been so disappointed in a service like I am with this company!!!! It is a disgrace!!!!