But what is the problem? If it is a hardware problem and the phone was advertised as working, simply return it. If you or PPC has not given/input the ESN correctly, it won't work. Did you triple check the ESN? Those 8s and Bs look a lot alike on those little stickers!
I just noticed you got it on CL, so maybe returning it isn't an option like it would be if you had used eBay. So be more detailed about the problem, and maybe somebody here can help.
LycaMobile-v1 PayG 2013-2016
Puppy Wireless-Test 2014
Red Pocket-eBay 2016-TBD (Main)
FreedomPop-GSM 700MB/Mo Free 2016-TBD
Ericsson AF738 Jul01-Dec03
Qualcomm QCP 2760 Dec03-Feb08
LG VX-8600 Feb08-Apr10
Samsung Omnia SCH-i910 Apr10-Nov11
HTC Droid Inc ADR6300 (CM7.2) Nov11-Jun13
HTC Droid Inc 2 ADR6350 (CM7.2) Jun13-May15
LG G2 VS980 (Rooted/De-Bloated) May15-TBD