My samsung s2 is being spammed & I have 2 apps that I can't uninstall. Please help
I'm going to presume this was a side-loaded app with a potential malware payload, since you mention you cannot find it on Google Play Store.

First step is to see if the application can be prevented from uninstall because it has set itself up as a Device Administrator, sort of a protected app.
See Settings>Security>Device Administrators, and deactivate both or either, if listed. You may need to provide a Device Administrator password to do so. Then try to see if they will uninstall normally.

If not a Device Administrator, you may still attempt to uninstall normally, just finding it in a different list, the "All" list.
See Settings>Application Manager>All(far right column)
Find the application(s) in the list. Try to uninstall this way, or at the very least "Disable" or "Turn Off" if those operations are possible.

To prevent side-loading apps in the future, see
Settings>Security>Unknown Sources, and uncheck.