Who called from 5034455500

Female speaking english says "Go ahead" then a different female speaking Spanish startts talking. Since I don't speak Spanish and don't know any one that speaks it as a primary languange I said "No" and hung up.

It sounded as if there where 2 people having a conversation. One in spanish the other said no at the end and hung up.

I think it's from a collection agency with Verizon Wireless. They somehow think I signed up for an account and hound me to pay, yet I never did. I reported them to the FCC as fraudulent.

I didn't answer and they didn't leave a message.  

Caller ID says "Pacific Interpr"

Just looked them up, it could be a spoofed number.
The actual number traces back to a medical interpretation service for the health care industry.