It seems my letters to Tesco and Morrison's about Fuel Card spam emails I received were simple forwarded to fuel card services.
Initially they argued that they were acting legally, then sent to a director, and then made an offer with a 2 day time limit. Only catch is that the offer was not actually attached so I have no idea what it was. I did not agree it, but now, some weeks later, £50 has appeared in my account from them.
One of these days I will get one of these to court.