BDTS keeps blocking Trojan and Phishing do I remove root cause?

I keep getting BD screens stopping a rogue phishing site from opening. However, I dont seem to be able to eradicate it despite running multiple scans. It happened mostly in Duck Duck Go browser so I deleted that. Now its happening with Firefox. I have an expired McAfee on the tablet and it comes up showing 5 pieces of malware and wanting me to buy another subscription. However, I thought BD would take care of this stuff? I bought a master sub and have it on multiple devices but it seems to be inappropriate for my Samsung tablet.....Help?