IF the source of the water leak was the tap and IF the waste pipe that the first cove replaced was actually ok, then you should only have to pay for whatever the call-out charge was for the second guy to turn off the valves for the tap. You explain that to them nicely, and they should refund anything you've paid them over that amount. If they don't, you tell them you will sue via moneyclaim.org, and you will add the cost of the ruined towels to the sum they owe you. You will almost certainly win. I don't understand, tho' - did they actually fix the problem? Replace the taps or whatever? I'm afraid I don't understand half your post.