Look at what Bird **** has Done to My A3

What i would be doing is seeing my solicitor, get him to send a solicitors letter as you basically paid for an inferior product/service in their paint job

In the mean time take it somewhere and have the job done right, you don't want the original cowboys touching it again especially not now things have got sticky! Then take your receipt and have a copy sent through your solicitor to the cowboys, any % of that money you gain back is a win as you don't want the hassle of small claims etc

Any actions you choose to get even with the original paint-shop, nobody on here would judge you for, but best not air them, joking or not on a forum, could come back on you! Keep us posted, hope it works out for you