Babbel - Dishonest auto-payments policy

I took a free trial, not realising their small print must have enroled me to pay ongoing monthly fees. It took me 3 months to realise they were taking a monhtly charge from my Paypal (stupid of me I know but this is the first time I've been aware of companies being able to effectively set up a monthly direct debit via Paypal without your explicit permission). I asked Paypal to block (they were useless) so deleted card. Having added another card recently I see that Babbel has again taken a payment from my account today. I'm surprised this is legal but then I guess they're based abroad so can get around any legalities. They're like a virus I can't get rid of - monthly payments will continue indefinitely unless I can get this blocked. I'm about to delete my Paypal account.

Overall the content is nothing to write home about in any case - I've found free content elsewhere which is just as good.

I caution anyone leaving details for 'free trial' that it links to your Paypal and they will automatically take money from your account and there doesn't seem to be a way of opting out.