Airtel — Refund of security and balance.

I have registered FASTAG with my vehicle number GJ36R0340. while purchasing FASTAG i have submitted my KYC as PAN number AXFPT2926E.
I have ordered FASTAG using official number- [protected]. given by our organization . Now i have been transfered and registered number is with some other employee. I have sent several mails and had communication with [protected]@airtel. but no conclusion . They asked me to tear the FASTAG in two pieces i have also sent the picture through mail . i have also provided my new communication number, i have not received a single call from there support tam.