Activating legacy product (Parallels Desktop 10)

I downgraded one of my old Macs to Mojave to dedicate it to retro gaming. However looks like servers have been sunset to activate this legacy PD.
activatepd.parallels.com no longer works, and even [email protected] is invalid. How am I supposed to activate this legacy license that I own?

BTW, this is the activation request code:
4e4441314e6a597a4d444a6b597a41774d5467774d4441794d444a6a4d446f345a574d30597a526d4e6a49355a6a59314d474931596a63305a574d35597a41305932517a596a42684e773d3d
If customer service sees this can you please dm me? Thank you