The only people that were in touch with me were support agents that were repeating what was said in the automated notification about payments being issued to customers after.

To me it looks like it took this post, a reddit post and Twitter mentions to get someone above the "normal" support to look into the matter, and put the automated refunds on pause while you investigate the case for a third time.

Nothing personal against you, but when almost 150k is held from us, and then decided by what seems to be a robot to refund all of these payments within 5 business days (although we've given you tracking numbers on the very first manual reviews where issuing refunds weren't even a topic) I hope it's quite clear that we're not professing to have a bad day, but rather that were acting in urgency to get fairly treated.

I'm not one to post on social media / publicly about my business generally, but when this is the only way to get your attention and I have roughly €250k euros at stake, what else should I do?

Hopefully we can resolve this (in a way where neither of us loses any money), without me having to take legal action against Stripe.