Did you check Your transactions?
We would like to make sure it is not something else or if all is well with you and the balance will be used for your next payment.
Strange if you didnt try to pay for your renewal during the process and both your payment and autopay applied near the same time. As suggested by @LurganIeUk just leave the extra payment in your account for the next payment. Refunds can take 30 days to go thru and at the current wait times it might take 30 days to hear from a moderator. Lol!