yep get the dealership to cough up for it,if youv'e cancelled the work
and they have have carried on regardless it's there fault also id get Witter to explain this £23 admin charge
just found this on Witters web site
5. Returns of items
5.1 We hope you will be happy with your purchase. However, should you feel it necessary to return the order; you may cancel the contract for its purchase by contacting us within seven working days of delivery of the item to you. You should then return the relevant item to us in secure packaging to C P Witter Ltd, Drome Road , Deeside Industrial Estate, Deeside Flintshire CH5 2NY.
5.2 Return of an order is required to be in accordance the return procedure as detailed on our website.
5.3 You will be responsible for the cost of returning any item to us unless the item is defective or we have delivered the item to you in error. The item should be returned to us in its original condition. If we do not receive the item back from you we may arrange for collection of the item from you at your cost.
5.4 If any item is returned not in its original condition , including unopened packaging ,we reserve the right to impose a handling charge which will be deducted from the refund payment .
5.4 When we receive notice of cancellation of your contract for any item, we will refund the price paid by you for that item or at your request if the item is defective we will repair the item or supply you with a replacement item. We will not refund the delivery charge for sending the item to you unless you are returning the entire order.
6. Cancellation and changes prior to delivery
You can cancel or change any of your current orders prior to dispatch by contacting us as soon as possible.