That’s good that they are after them. But from the customer and cardholder pointed view … the merchant activity have been authorised by Visa Mastercard, the bank has obligation to report this to Card network and chargeback rights still do exist.
What everyone needs to do is STOP funding these websites, full stop. Santeda especially have been warned and warned numerous times about taking card payments from the UK/EU countries with wrong descriptors/MCC's. They don't listen because it is far too lucrative a market for them and they will take the odd chargeback because ultimately they are still making a fortune. Just stop putting anything anywhere near them.