Said he was from Conn's. Asked for someone I don't know. Told me to call 800-898-7105.

This is Conn's.  If you have an account w/them, you have a 10 day grace period from the due date to make your payment.  I have never not made my payment.  But I do usually use a day or 2 of the grace period, depending on my pay period.  They will start calling you the very next day when your payment is due.  I have exactly 5 more payments to make to them.  Once I'm done, I probably won't go there again.  I know they want their payments, but to start calling the very next day is very annoying.  I'll be glad when I pay that account off.