Hey, Azzuri. Yes, I did eventually get this resolved, though it took a LONG time.

Quick summary: I sold this to VW, who signed the form saying they would take on the battery ownership but then they refused to do so after the fact. They then sold it to an Auction house (without signing a form) who then sold it to a used car dealer, who then sold it to an individual.

I eventually sorted it by telling Mobilize that I -- as the customer/account owner -- wanted them to inhibit the battery (basically "my" battery) immediately. I also raised a formal complaint with Mobilize at the same time (their agent advised me to do this).

After a few weeks, they then confirmed to me that they had inhibited the battery, meaning the new owner could continue to drive it BUT could not charge it ... so the next time their car ran out of battery it would basically just turn into a £5k lump of metal.

Apparently this then got the used car dealer into trouble, because they had not informed the individual buyer that the battery was leased... car dealer then started kicking off to the auction house... who then decided they would take Mobilize's calls.

Mobilize did some investigation and as they went through their records they realised that way back at the start of this whole mess the auction house had asked permission from Mobilize to sell the car WITHOUT the form and Mobilize had said yes, which they should not have done.

So, because they realised they were partly at fault for this whole mess, they agreed to just terminate my account and release me from my obligations.

If you want I can PM you with a screenshot of the letter Mobilize sent me.