Impossible to ask a reset of GroupShare license

I have this GS server installed UI: 15.1.13 GS: 15.1.13.14280 - GS 2020 SR1 CU13 in a VM machine

I had an attack and i had to reinstall a total backup loosing the access to the license not deactivated

I tried to contact RWS to ask the reset of my license and it was a mess, i couldn't do it!!!

It's a production server and i need URGENCY to activate it

WHAT CAN I DO AND SOMEBODY HELPS ME, PLEASE

THANKS

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