Thanks a lot for your answer. Does this mean, that the receipt has not been sent to my mail, despite it said so, but will be so, once the beta is open and i am issued the beta-key? What are the chances, it will happen by tommorow?
In regard to the storing of payment information, i suppose i am just being paranoid. I have been using my debit card for digital purchases only since last november, when i got iPhone and wanted to buy apps from their store, therefore i am not really experienced in using it - not that its rocket science - but i still feel slightly "insecure", everytime i do.