Do not buy Cata Products

I bought a CATA gas hob GH600 in May 2016. In Sept 2016 I had Landlord certificate done for the hob as it was fitted in the tenanted property. The Gas Safe man disconnected the hob stating that there is a leak inside the hob. I had to buy another hob and get it fitted.
I went to B & Q where I had bought the gas hob from and they told me that they cannot do anything as the product was purchased more than 45 days ago. They rang CATA repairer for me who were so rude that they put the phone down on B & Q employee so he gave me the number and told me to ring myself. When I rang 0800repair telephone number who I understand are the main repairers for CATA they told me that the engineer has to come and check it despite me telling them that the hob has been disconnected by the Gas Safe man and he has given me the report as well. Please note that the repairer use 0844 number and make money for the pleasure of you ringing them.
The engineer from Capital Repairs came and could not check the appliance as the hob has been disconnected.
B & Q cannot help me despite the product being less than 6 months old when the engineer disconnected it and there is 2 years guarantee and 0800repair cannot help me either as the hob has been disconnected. I am at a loss in the tune of £165 as I had to buy and pay again for the hob to be fitted.