The author describes a frustrating experience with PayPal, where they received an unexpected payment, tried to investigate and resolve the issue, but were met with unhelpful and sometimes accusatory responses from PayPal's customer support. The author eventually had their account blocked and was asked to provide receipts for a product they never sold. The author is wondering if this kind of treatment is customary for PayPal. The experience has led the author to close their PayPal account.