Integration of InMobi with HeyZap Mediation

Hi Unity Community,

I have been trying to integrate InMobi with HeyZap, followed their instruction fully and I tried their testsuite for testing the integrated ad networks, when checking InMobi it shows all the fields in green like so: (the requirements for ad network integration),

yet when I try to show the add I get "Display Attempt Failed" message, I have tried contacting both InMobi and HeyZap regarding this, they either answer back 2 days later with a generic question: "What SDK version are you using?" in other words the support there sucks, I have even went a step further and tried to check with Charles Proxy whether there were and calls from HeyZap to the InMobi ad servers, and there were none, absolutely nothing, so I am asking for help in integrating, if anyone have successfully integrated these 2 networks together or have stumbled upon this issue, please direct me to the right way of doing this.

The integration is for android I forgot to mention.

Thanks guys for any answers.