Our wheel gets spam!

Hi,
There’s kid using a bot or macro that refreshes the wheel 2-3 times a second along with tons of emails to get the free item, he got it 8 times so far. I’ve done everything I can, removed the coupon from the frontend, and made it only visible in the email, turned on Recaptcha V3. Nothing worked, the plugin is very vulnerable. Do you have a solution for me or should I get rid of it?