Who called from 8780006004

Called me nine times in 10 minutes on my cell on a Saturday, even after I told them to stop calling. When I answered it was a very bad connection, lots of noise & static, and I could barely hear a woman speaking a foreign language. Unable to call # back or find any info online.

Look again, at the phone number.
Concentrate on the "000" part.  See it?

Now, realize that NO PHONE NUMBER IN NORTH AMERICA STARTS WITH A "0" IN THAT POSITION.
https://en.wikipedia.org/wiki/North_American_Numbering_Plan

Therefore, the call did not originate in Pittsburgh, PA, or any other place in North America.

Time for you to get a phone blocker that can block such calls.  Google is your friend.