Avoid this company! Plumber who was sent to look a...

Avoid this company! Plumber who was sent to look at our boiler said he never seen this type of boiler before (one of the most sold brands!). Kept looking for leaks although we told him there aren't any. Decided to turn heating to max so had to wait almost an hour to get to the max - wasted time again as we told him the boiler is loosing pressure. After 1,5 hours of playing around he said he does not know what's wrong (= was not able to fix it) and he thinks it is not worth to repair it and we should get a new one. Totally incompetent! Complained to the company, phoned them several times,always promised to come back to us but NEVER did. Charging us for job which has never been completed!
Update: the job number is 4033391 -Job ref.number .