You may have a malfunction in a number or just one of the many areas that would cause this refusal to activate.
Could contact:
Local B&M Vape Shop (Visit)/someone who knows what their doing -----Might be simple.
Vendor who sold it ---see if they will repair or replace or advise (any authorized distributor).
Manufacturer contact ---see if they will repair or replace or advise.
Definitely worth a look at:
The ECF Troubleshooting Guide - Revision 3