Turns out I was correct to by cynical.
I batted back 4 emails requesting my banking details and each time I requested the settlement figure they were proposing.
At the 5th email I sent our banking details and again requested details of the amount.
A week later we received an email from a slightly different email address, one with “no-reply” hidden inside it, saying they had deposited 100€ into our account in full settlement.
We replied to that email by changing the new email address back to the old email address and after a few days received annother email saying that they had re assessed our case and we’re not going to change the amount paid.
Going to hand over to an airline compensation company now……