Possible thoughts.
If you are a member of the RAC AA or some other program prepare a summary as you have above and send it to them asking for advice, in many cases cover for legal and other things is included when abroad.
Dumb question but have you factored the 1-2 hour difference? Are you dashcams on UK time against local time in region ? Just a thought ?
Has your plate been cloned, any other reports of oddness, given you had been that way it is an outside possibility but you never know.
Looking at the interweb there does appear to be a pay it and ask for proof (to get the half price if nothing else) however the chances of reclaiming may be a stretch based on comments on line.