What happened to customer service value

I bought a tablet from hifi corp. This would have been the 3rd time I had to take it back. Took it back on 25 Jan. Up to date 3 weeks later they still have not repaired it. Still waiting for a quote from the supplier. What for 3 weeks u have been waiting for a quote. On Sunday u have had it for 21 days and it has taken you 21 days so far and still no quote. Really!!! I have seen your staff rolled their eyes at me giggle into the phone and act real unprofessional. So much so that I asked them to just give me back my broken tablet unrepairable just so that I don't have to deal with them any more ever. But i don't have it back now I don't know what else to do. Should I just let them keep it and walk away. One thing I do know is it is an very expensive lesson I am learning. But now I want to know is it all hifi corp or is it just Clearwater. What I do know is that you are loosing a very long and loyal customer. And from when I was holding onto the phone not the only frustrated customer either