Amazon Spam Bot Traffic

My website has been inundated with Amazon spam bot traffic. They have been hitting my robots.txt file. Does anyone have any advice on how to mitigate this traffic? Thank you!

I should add - I do have the IP Filter plugin, and I've tried adding IP addresses, but there are so many...and I fear - since IP addresses change so much - I could be blocking good traffic.

Two things I can think of:

1) Web Application Firewall (WAF).  Does your host have one?  Otherwise Cloudflare or similar.

2) Contact Amazon: If the spam bot traffic is specifically coming from Amazon's servers, consider reaching out to Amazon's support to report the issue. They may be able to investigate and mitigate the problem.

Great ideas that I'd never considered. Thank you so much. I appreciate the insights.