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It's a shame if the receipt cannot be found, but more crucially, was that more or less than a year ago?
If less than a year ago, the tablet/transformer is covered by warranty from Asus (or whatever maker name made the tablet/transformer in question.)
This is JustAnswer.com. We are not a part of Asus, though the Asus site may have directed you here.
I have no power over billing, payments, etc.
I must refer you inquiry about subscription status or monthly payment, to Customer Support at JustAnswer.com:
which can address your concerns, if you would send them an email about it.
Thank you for asking your question here at JustAnswer.com, and I feel that you have been directed onto the right track to follow, at least, with regard to this Asus transformer/tablet problem.