no response

I bought hisense fridge in October/November 2015 and the fridge is not working, first it was the top part and later on the freezer part also stopped. I reported the matter on the 18th of December 2015 and up to now no one has called as I was told that someone was going to call me. I visited the shop 3 times to find out what wais really happening and also made numerous calls and I always been told that Portia who is responsible for complaints is not available.