Fellow Brits, what are you doing?

Clearly, we are no longer in the EU (arguably the worst decision my country people have ever made). However here we are, semi isolated.

I want to do my part too. I want to use only European (and Canadian) products and services. In terms of foodstuffs, this is not at all difficult, but services, yikes - until recently, I'd not considered how much of everything I do is based on a US service.

What are you doing for financial transactions? Is there an alternative to the Visa/Mastercard monopoly?