CA's system is a mess right now, so we sent the unemployment repayment check to an address we were told to, but got no confirmation. Can I count this as having repaid?

We got a 1099-G in the main, however we never received a notice of overpayment (however, unequivocally, we know we were fully overpaid, so we spent none of it). We messaged unemployment online and after 6 months, they finally messaged back. But that's all we were able to ascertain as it relates to details on how to return the money.