I am having a problem with my boiler since I had a power cut a couple of weeks ago. I've had no heat or hot water since then. Can anyone advise me on what I could maybe do about it. I've topped up the presure and cleaned the gas burners but nothing has worked. I did phone up a company and explained it to them but they never turned up, so I'm worried something terminal that's up with it! Any advise greatly appreciated.