I would set up an A record for ‘www’ and give it a bogus IP address, like 8.8.8.8. Then add a Page Rule that redirects www.ombexquantumprotection.com/* to the non-www URL. The page rule will immediately redirect the visitor instead of sending them to 8.8.8.8
Or try to figure out why your server isn’t recognizing ‘www’ as a valid address for your site.