Quad ESL service, Electrostatic Solutions or Quads Unlimited ?

@osborn  Sounds like you may need to remind Wayne P that there is a legal avenue available to you here in the US...it's called small claims court- and might be necessary for you to investigate. 
Pity that we get to hear these horror stories on these folks...particularly after they have 'supposedly' garnered a good reputation.

Grateful for the advice, especially about the US small claims court. Had assumed that because I am a UK citizen, it wouldn’t be an option.
Just needed to search online. It is.
Onwards!

@osborn  From one fellow Brit to another, you are welcome..:0)
Good luck.Merry Xmas.

Electrostatic Solutions is superb. I purchased a total rebuilt pair of ESL 63's. Kent was great, good communication, and great work and warranty on his work. I would use him again with No reservations. A+++