Some ads make my website unstable and not removing even i had turn off my ads

Till yesterday my website was working correctly and showing ads without any issues, but today when i open my website there was some kind of different language large text showing on my website, the last thing which I did to my website is added ads.txt file to my website root directory which AdSense panel said me to add.
please check the screenshot and help how can I make my site get stable again.
All that unnecessary text is showing before my website header on all pages.

also, check out this image the which it is showing
https://storage.googleapis.com/support-forums-api/attachment/thread-115553237-15059133825456656661.jpg

The page I need help with: [log in to see the link]