I come from e-commerce

[hackseller]

Ok, I am doing something wrong here.
I have tried few amex, visa and mc cards from jstash (signature, green, world cards) just to give it a go and see how this works.
Setup:
PureVPN, socks from 5socks(.)net at the same city. No dns leak, everything looks fine, at least whoer(.)net says that.
Mail on cc's name with outlook. (?)
Visas always wanted VBV (pre-approved numbers phone verification) so fuck visas.
Amex almost got through, but few minutes later after purchase I got an email that order is canceled.
Mastercard just says that the transaction is canceled and to call the bank.
Shipping addresses were ALWAYS same as billing addresses.
I have tried few sites I usually buy shit from, and few that suppose to be good for carding (digital goods) and no luck. Everything TYPED correctly etc.
What am I missing?
Is it my choice of cards? Do banks always want to confirm transactions by the phone?
Is it 5socks?
Is it everything above?