Who called from 8434734634

Hung up when I answer. Called back and it says to leave a message so a representative can call you back. Does not say company name. Scam call.

Keep calling but doesn't leave message. Second time in 24 hours. Don't know anyone from SC.

I believe it's a collection agency or selling timeshare. They don't answer when you call back,so I think it's a rolling #.
Never leaves a message and calls from 8am to 9pm about 20 times a day.