Manually changing status after a refund

sksallaj

Client tried to avoid sending me a check, and tried to pay me through wave, which I prefer not to. Sorry to say, but the fee is expensive (two checks = $50), and the processing takes a week to go in, and I don't want this to be a reoccurring thing as this will fee will pile up ~$100 a month. If I get a check, I don't pay any fee and the transfer is only 1 day.

So after I refunded with a request to use the original preferred payment, the status on both of my invoices still says its been PAID. How do I make it go back to the original status before I unwittingly made the mistake of accepting the payment on wave?