Who called from 6477884380

Called, didn't answer, left no voicemail. I called back and it was CBV collections.
I don't have any business with this company.

Why do these people call so much? Do they actually believe someone will answer? Mind boggling.

why does the app on my phone say they are calling from india

Unfortunately, they do.  You need to let everyone you know that they should not answer unrecognized numbers because other people still aren't aware of all this garbage.

Probably because it is a pretty smart app and the number is spoofed.  There are an incredible number of these scams.  Trust your app.  Don't answer any unrecognized numbers.