It's weird how it's not deleting the spam entries when you've supposedly removed the account.
I'd suggest double checking you've removed the email through your settings and accounts. But if that doesn't work, I'm not too sure at this point. you may need to reach out to Samsung support or if anyone has any other tips.
Step 1: open your internet browser and click the three dots top right to open the settings tab. Then scroll down to find site settings. Open data stored near the bottom and clear all. Then scroll to top and find all sites.. clear them all. Seen fake google in there and others. Now the door is shut.. time to clean house.
Step 2:go to about phone and find build number and click it 10-20 times.
Step 3: look in the system tab above about phone for the new developer options you just unlocked.
Step 4: open developer options and the 6th one down says running services. Open it.
Step 5: there is a program running that you are not using and sometimes it is hidden in the cache. So check the first page you opened.. if the virus is the calendar then end program.. if your not sure. Well if it's not google or service related.. then it's probably that.
Now if you don't see it. Click the 3 dots top right and open the cache. You will find it there.
Problem fixed
NOTE: even with antivirus and DSN I got this calendar virus. So watch **bleep** on a VPN or do this every time you do.
