Hi, my name is coldcustomer! Advice needed regarding a bungalow with cold and damp issues.

Hello. Need some advise pls. I'm in a disability bungerlow and just had my walls re_ damp and plasterd as allplaster had fallen of down to the brivkwork.Problem is and has been is the radiator is 15 inc L for a 15 ft by 11 ft kitchen. The place is so cold that there is frost on windows and the plaster work is still damp? I won't go in as far too cold causing my chest to whese. Iv ask council for bigger radiator. What happens if they refuse to do this ??