Not being funny but if your customer didn't even have the common sense/decency to phone you to confirm that this was the case then...well... words fail me!
What I can't understand is how did they know how much to charge?
Legally I don't expect there's much you can do really...I mean I don't think telling porkies is illegal (unless of course you're in court!)
Illegally you can round up the boys and give the see-you-next-tuesdays a good kicking!
What did your custy say after you'd explained she'd been conned?
I is illegal for them to do this, call the police and have it logged, years ago I had a guy do this to me on a round I have in Cambridge, my first thought was to wait and catch him and give him a slap which I intended to do (not the best thing to do at all) it was only when an old lady that trusts me and guy working for me at the time let this guy in her house, she never called me, he said I had broken my leg and he was working this round from now on.
This to me was a step to far as the lady was very old and it reminded me of my nan, I called the police and it was logged I explained to this lady never to let anyone in her hosue unless they had our uniform on and if she not know the face to call me direct to verify.
Police did nothing as usual, he stopped doing it when he went back the next time cleaned windows lady did not pay him and said she was calling police because she knew he was a liar (through her door)
never seen this guy since.
CALL THE POLICE, AT LEAST IT IS LOGGED.
Ian