Do a Google for "0-808-189-3407 pop up removal" although I think MalwareBytes free tool will help you remove it.
Basically, you've (or someone using your machine) to install a piece of malware. It usually comes bundled with freeware/shareware installers and therefore can bypass any usual pop up filters. it will have attached itself to all installed browsers (chrome, firefox, IE etc).
There are plenty of removal tools out there, but... there are also a few removers that install something else. Try malwarebytes tool first and if no luck, come back and I'll see if I can find something else. (I think Kaspersky also has a dedicated removal tool on their free download page).