A1 - pressure washing services

Hired them for driveway cleaning including resanding the surface and agreed a price. Couldn’t finish on day 1 as was having issue with pressure washer, even helped him providing engine oil. Told him we are away following day but son would be home. After cleaning, he used 3 bags of sand which left gaping holes between blocks. Son said this is not good and you have to put more sand. Added one more sand bag which still didn’t make much difference. Charged my son £40 extra for using an extra sand bag.
Called him when back home and they started to argue price was agreed with 3 sand bags which was never mentioned. Also the mrs took over saying I talked him down which is rubbish, we agreed a price in person with him knowing what he needs to do.
Just won’t listen and repeating the same and after few minutes just disconnected the phone.
I knew the drive way would take more around 7 bags. I had to put another 4 bags of sand to finish job.
Will never use them again and will never recommend to anyone. Worst experience More...