We had no heating so called British Gas as we've got a homecare agreement. They had no-one available so put us in touch with ERG Facilities who would come out and do the work then we could get the claimed back from British Gas. The guy came out and spent 15mins in are house and said it was an easy problem and we just needed a new "Mid position actuator (Drayton)". He left to go and get the part and came back and fitted it in about 20mins. Now we've instantly been charged £812.40 for this. 3 hours work @ £189+Vat per hour and £110+VAT for the unit. I contacted them so say he was only in my house for a max 45mins so they contacted the engineer and he's saying he was there for 3 hours. The company are saying as I can't prove he was there for such a short time the bill stands. I know BG will pay for this but it's not the point - he's scamming money from BG for work not done. Any ideas who I can raise this to or what to do hear ?