Well done! Those sort are pain. Got caught once, no more Mr Niceguy.
When I sold my workshop building I got billed for all sorts of surveys.
There is no mains running water £80. Ching
There is no connection to the main sewer £80. Ching
There is only single phase electricity. £80. Ching
There is no 3 phase electricity. £80. Ching
There is only parking space for two cars. £80. Ching
And so it went on but the buyer who desperately wanted the building just had to stump up as I was certainly not paying for things I had declared anyway. Naturally he had to pay a bit extra for my inconvenience.
Not his fault but the lawyers were a shower of chancers.