Sime Friendly 80E Boiler. C2000 No Flame, no heat! Help!?

Recently paid £170 to get the diverter valve replaced and pcb as had no running hot water but radiators worked. Now no gas flame and won't light even though boiler sounds like its running. Ice cold water, no radiators, no heat! So stressed out and wondering if I need a new boiler if its just going to break all the time? I know its an auto light boiler but has anyone experienced this and how much was it to fix? Will get a corgi gas guy out tomorrow.