i had a slow payer who ended up moving house owing me £60 , a couple of years later i dropped on them in a bar in magaluf the look on his face when i said you owe me 90 euros .
I got bumped for £16 by a copper.
Don't think I will get that back as the family went to Australia.
I think they still own the house and rent it out. I would love the tenant to get me to do a clean (I still clean next door). £16 would go on the price straight away. When/if I got paid, I would suggest billing £16 of it to the landlord and/or their agent.