Dashboard disapearance after deleting w3totalcache (error 404)

I was getting problems with w3 total cache plugin. So I went ahead and deleted its folder from WP-content using ftp. Now I can not even login to my dashboard any more. I get the following error:

"404. That’s an error.

The requested URL was not found on this server."

How can I fix this problem?
Thanks

what is the site url?

Please go to your file manager and delete the .htaccess file

After deleting .htaccess file problem remains sa!e

Delete its folder too, wp-content>plugins> Delete the cache one.