A couple of years ago I had a similar situation where I 'Accidentaly' caught a wall whilst carrying my gear upstairs.
It was an old cottage and the plaster was very fragile. It made a mark about the size of a 50p piece.
I did an immediate repair, knocked money off the bill and cleaned an extra room for free

The lady was at work but her 20 something year old son said it would be fine as they had some paint in the right colour.
2 days later I discover an email from the lady..

demanding I pay to have the entire Hall Stairs & landing redecorated or she would take legal action. Nice Lady I thought

I rang my Public Liability Insurers who were brillant. They said I should have no further contact with her as they would deal with the whole thing for me..

As for decorating the whole area, they said she could p*#s off as they wouldn't have paid for it if it was her own insurance so no way would they be doing so on mine.

The funny thing was that about a week later she emailed me again to thank me for my prompt attention.

I've been waiting patiently for her to call me again to do some more work. I want the pleasure of telling her to S#d off !!
She's the only one like that I've had in nearly 8 years so I just put it down to experience....and keep up the payments on my Liabilty Insurance

Les