I am not even sure if that's legit, I've been trying to contact the support on cryptsysettlement for a week with no response.
Did you fill in the Claim Form? They do acknowledge it as received.
The form says to phone them if you fill it out electronically to receive a permission, but they never respond. I tried emailing them too, no response.
NOTICE REGARDING ELECTRONIC FILES: Certain claimants with large numbers of transactions may request, or may be requested, to submit information regarding their transactions in electronic files. All claimants MUST submit a manually signed paper Proof of Claim and Release form whether or not they also submit electronic copies. If you wish to file your claim electronically, you must contact the Claims Administrator at 1-888-868-4936 to obtain the required file layout. No electronic files will be considered to have been properly submitted unless the Claims Administrator issues to the claimant a written acknowledgment of receipt and acceptance of electronically submitted data.