General paypal question

  1. I recently bought something off Rapunzel's Closet, but I got an email saying it was sold out (I am so bummed!). The email said my credit card had not been charged, however I paid by debit card and the funds are already out of my account. They said if I paid by paypal they will immediately refund but i'm kind of assuming that's if you used the funds in your account?

    Either way, my question is do you think they know they have my money? If so, how long do paypal refunds clear?