Sly - Driver Clearabee Employee Review

I had no problems when working there, but I had to leave due to personal reasons and offered to do my notice. I received my payslip from them and they took 75p per hour of my wage from me (it is for driving bonus but there was no issue with my driving) and underpaid me on my hours by atleast 30 hours. I have heard they underpay on hours wherever possible and try and get away with it, they have no morals.