Bad, very bad service delivery.

I bought a Defy dual gas/electric stove from them. Not even a month later, one of the gas stove plates stoped working. When I called them to sent a technitian, they asked for a COC certificate for the gas because they want to know if it's safe for the technitan to be on the premises. I was not very happy with that response because since when does a company where you purchased an item from, requires a COC. Eventually I sent it to them and the tecnitian came out and just my luck, the plate worked. A few days ago, I used the same stove plate and it's doing the same issue as last and this time I took a video as proof. When we phoned them again, they refused to come out. I will NEVER buy anything from them again and wouldn't even give them a star if I could.