Replacement Explora Decoder has packed up

Nearly 2 years ago I won a new Explora decoder from Multichoice. The conditions of the prize was that I was signed up to DStv Premium for 2 yrs-premiums unchanged. However at the end of July our Decoder packed up. I took it to N1 City Multichoice and they gave me a replacement Explora decoder. A week after we got the replacement decoder, Showmax stopped working. After multiple attempts to get Showmax back, nothing has happened. Then on about 7th August, turned TV on and now have a message that says Hard drive installation in progress. Hard drive may be *******ed. Now we can't utilise Catch up, we can't pause etc Again, after many phonecalls to Multichoice, the issue has not been resolved. I have now been told to take this decoder back to N1. I live in the Fish Hoek area, so it is a long way to go to get take this decoder back I am so unimpressed and no one at Multichoice seems to be able to help me.