https://support.chess.com/article/572-what-are-your-payment-policies-refunds-services-currency-etc
https://support.chess.com/article/1963-request-a-refund
I would guess that the pro-rated refund would be non-existent because your profile says that the membership is dated from last July. I would think they would look at what the monthly charge would have been over that eight month time period and subtract that from the amount you paid. I get a negative number when I run that calculation. ( $99- (8*$14))
The only way to find out for sure is to write to support.
Please let me know.