ddos protection is not work. I'm asking for help

Hello, for over a month there have been ddos attacks against my server. I have connected it with cloudflare and done all the ddos protections, the server itself is also with ddos protections, I even connected it to ovh mitigation network.

but that doesn't help, my site is attacked again. I managed to find out one of their methods of attacks - they use elastic IP addresses that are not affected by any ddos protection.

I am asking for help to solve this problem...