Please I have the same issue
In my case the URLs appear something like this
https://www.google.com/amp/s/medarchivemagazine.com/3rd-mbbs-exam-in-nigeria/%3famp_markup=1
As google AMP with the markup at the end of the link
I have removed the amp plugin, redirected my contents, but the worst part is that even after I publish a new post, it is still served as Google AMP on Google search and on Twitter.
I have tried accessing my htaccess file to add the redirect AMP code, but didnt work.
I followed the guide provided by Google on how to remove AMP pages, but I don’t understand what they mean by clearing Google cache , because I have cleared my browser cache many times and nothing has happened.
Please guys, is there no way to fix this?