Hi!
I tried to login via both Edge and firefox, both failed.
So I guess the problem is with the site itself or as you say the recaptcha function.

Maybe if you go to Sharecg, Wilmap used to be there:
https://sharecg.com/v/77317/gallery/21/DAZ-Studio/Genesis-Casual-Pants-Top

If it was me I would have donated $1 via the Paypal link Wilmap has on sharecg and in that way try to get a hold of a email-adress to wilmap.

Regards / Jonny

Edit, maybe you will ha better luck posting this in the Daz Studio forum here on Renderosity.