NO. whatever you do, DO NOT pay him
“Please never pay someone to stop abuse. Paying someone gives them a reason to try to do it again. You have ways of fighting back. Roblox has a team of staff dedicated to reviewing abuse reports, and Bitcoin has a database for abuse reports (look up Bitcoin Abuse, easy to find).
I can not stress enough how important it is to get authorities on the matter involved. Financial threats are a serious matter.”
quote from this post: Is it possible to make an anti-DDoS? - #3 by The_PieDude