Refund sorted quickly and professionally
Partner accidentally set up an account with one of my cards back in Nov 25 (we have a shared Amazon acc) realized her mistake and thought she'd cancelled it and set up a new one under her name. I noticed today they had been charging me each month. Spoke to an agent, explained the situation and they cancelled the account and refunded me all the payments which I had not signed in or used the account. So I can't ask for more than that, amazing service.
Will only update with further info if the refund doesn't come through, so if no more info added here, everything was golden.