External spam pages linking to my website pages

[thebooktree21]

When someone clicks on one of my site pages for the first time, they sometimes get a totally different, spam page that shows. If they exit the spam page and click on the site page again, the correct page from my website appears. Does anyone know how to stop these spam links happening? 

[Ellie_]

Hi there, @thebooktree21,

Are you able to send a link to your website that gives that spam page?

[thebooktree21]

Hi Dani, 

This is one of them from today https://download-portal.net/notification.html?an=ac&cid=166337287910000TAUTV417064950144Vc9&sid=3001... 

The one in the image I attached in my initial query is https://slickperfect.com/XEw9ELIO45R9ilD3XAcqqiA9C33E5RYy5bTCMnA6dd4/?cid=63214ad022f1fd000141cd63&s...

They change all the time. Once I exit the spam page, the correct page from my website is shown. I've checked all my pages for unnecessary or external html code and looked at the SEO settings and all seems fine. Can you help/offer advice please? Thanks so much. Kerry