Zyxel, I paid SSL Vpn service, give it me back!

Bought a couple of Usg Flex 500 on July 2024, I need SSL Vpn and Flex 500 support 150 SSL Vpn connections.
Two months later Zyxel announced that SSL Vpn are discountinued with no advance notice, now I have dozens of users using unsupported SSL Vpn.
IPSEC Vpn are not an option for us, I bought and paid Flex 500 because it offered 150 SSL Vpn connections.

Any way you can support for a service I paid for?
Regards.