I did that 4 times yet would still call back very pissed.
I asked to speak to his supervisor. When he said he was it, I asked for full name, the company he worked for and the physical street address of said company.
Before he had a chance to call me back, I took the phone off the hook and all he got back for an hour was a busy signal.
I was serious about giving his phone number to my attorney and proceed with harrassment charges amongst others.
Somehow, I don't think he'll be calling back.
Thanks for the tips guys and gals.