Microwave

i have send my microwave in, they told me that it will go for repairs. the microwave is not even a year old. i called them after 2 weeks they said they waiting for a part. So we waited and waited almost a month. so i decide to go to the store and find out what is happening. the microwave was at the store. nobody contacted me, so we ask them to test it but the microwave did not even make a cup of water hot, and there is a big dent on the side and the top of the microwave when i questioned it they said they going to find out what happened and they will contact me on Monday. Monday came and gone so decided to call them yesterday and said they going to get the lady to call me back. after waiting for over 2 hours no response. so called them again and they don't pick the phone up at customer service. this is totally unacceptable. the store is Game Vincent in East London.