Dimplex storage Xls 18N?

Hi guys, I have two storage heaters in my flat. 1 in the living room and another one in the hall way. My hall way storage is not charging. Initially, it was too hot and then i thought, will turn it off for the day or two as the weather was improving and then I turned it back on, its not working. Not sure, what is the problem?
Dimplex guys have given me a time slot after 2 weeks and I feel the cold in my flat. your help to fix my problem would be helpful.
thanks in advance. Cheers