Booked engineer arrived. Advised that they could not service the boiler as they need to resolve a potential blockage in the water tank first. I asked if I would be charged for the call out of 20 mins. Advised I would be charged but when he quotes for the additional work it would include the bolier service which did not take place. The next day I was charged the full amount. I have still not received quote (4 days later) for the additional work. I have complained to the company via email. However will be taking this further as this appears to be their standard business model. Charging of non delivery of the actual service, how is this ethical?