It's easier than you think.
Email IAA Licensing with scans of your log book showing your hours and the 1hr instructor flight(s) you rely on for revalidation and they will print/send you a new ratings page for your licence. Until a couple of weeks ago they were sending the page by PDF for you to print yourself, along with a covering email to keep with your licence to say that "print your own" is a temporary COVID measure.
They don't ask for any money. No need to pay anyone €50.