IMDB Pro non US Member/membership proof

Hi, I have the following question, sort of separated in two. First of all, I was on a 30 day trial until some days ago when I was charged an anual membership; I'd really doubt I went on to choose the anual option knowing I could get billed 150$ if I were to forget to cancel before the end of the trial considering I am only a regular person who uses Imdb pro because I follow a couple of actors closely, so my first question is, is there no way I can make sure I Indeed chose this option?

If not and I have to be billed for the next year, I don't live in the USA and therefore my payment method (a mastercard) is not accepted. It is saying I should contact my bank in this case, but I don't understand why or what I'm supposed to do, or say if I am to contact my bank. Anyone can help me?

Thanks