I highly doubt it, I've requested refunds from readers and read with them at later dates. If they block you for leaving low feedback, I'm sure they'd definitely block you if they knew you got your money back lol
I've done the same lol and I agree with the last sentence
Yes, of course we know. They take the money out of our transactions and the 'keen' customer name is on it, with the date and time of the call.