Vodafone — Deactivation of number

Hi - I had cleared all dues at vodafone store when I ported from Vodafone postpaid to prepaid - However, a few months later my number was deactivated (without any notification by mail or emails). I have since been trying to get it back and all I am told by vodafone stores is that they are not able to see or find it in system - some even told me to check with Airtel. I was also told to keep checking back in few days - but it has been about 9 months now

I would like to have this number reassigned to me please asap and get support without being rerouted from one to another.