unknown number calling

A woman with an accent that sounded like she was from India called our business I answered with our company greeting at 1st just heard what sounded like a call center background noise, heard a lot of people talking and typing. I said nothing just listened. The woman keep saying "HELLO" Still I said nothing. before she hung up. Added this number to our in house ( company) do not answer list.

Scam

Called at 1:45 pm. Left no message. I blocked the number.

Called and asked if I wanted to attend a webinar regarding insurance.  Claimed they were a new insurance company.  I answered that I have insurance and not interested. She hung up. Sound like a call from Timbukutu/foreigner.