Under GDPR, people have the right to have their PII stored accurately and can demand corrections from companies. There was a case where a bank couldn't store someone's name properly, because its legacy systems couldn't handle characters with diacritics. The customer sued, and won.

https://shkspr.mobi/blog/2021/10/ebcdic-is-incompatible-with...

Not a lawyer but I imagine this is a similar sort of situation and the same reasoning would apply.

My understanding is that the lawsuit is still ongoing. Maybe some legalese is going straight over my head, but was it ruled in favour of the plaintiff? How much was the fine? Will they have to pay it for as long as they are not able to change the customer's name?

Sadly, no. I only have 2 digits on my email to form a pattern. As said in the post, the guy whose bank statements I received had 5-6 more characters than my name, and didn't even have a number in it.

GDPR applies for EU companies, or companies dealing with customers from the EU.