I went to pay through an e-mail. The first e-mail wouldnt let me pay the right amount - it had an edit amount button but wouldn't go up to the amount needed. The second was for a higher amount but when I went to edit it, it paid the whole requested amount, which was too much. Fortunately I was able to stop the payment through my bank. I don't know how this happened. surely there should be an ask come up - are you sure you want to pay this amount and who to.