Put sophos into the trash and empitied it, and still hasnt uninstalled

I put all the sophos files into the trash and empited it as i could not install trend micro maxium security with Sophos on my macbook pro. Now that i have gotten rid of all the Sophos files, trend micro still says that i need to uninstall it. When i try to redownload and install Sophos to then use the unistall wizard, i cannot even install it due to Sophos also saying that Sophos is already installed, similar to Trend micro. I now have no security and am very confused and annoyed any help would me greatly appreciated. 

Thankyoy :)