Rubbish service department

Purchased remote controlled trolley in March returned it as it was pulling to one side when it was returned to me one motor wouldn't work the other went backwards. Returned again received it back on the twelfth hole a seal fell out of the motor one screw wasn't tightened the other was over tightened and stripped the thread. Returned again received it back the was glued (treadlock) into the motor on return I phoned the service department and was told by Muppet that this was a correct way to do a repair,motor v