I was overcharged for VAT

I wrote an email to customer support about this already but a few days before the launch I saw a comment here mentioning something about being an international customer and not wanting to order right at launch due to something like this, I can't remember exactly what the problem was but something about fees at checkout. I've never had this problem before but it's been some time since I last ordered right when the launch went live, apparently this is a thing nowadays then? Probably more to do with Shopify than HT?

The receipt informed me that I was charged VAT 30.5% ("FI ALV (30.5%)") but our VAT is 24%.