Tata Docomo — not able to port my number

Address:

Thane, Maharashtra, 400602

I am old customer of tata docomo since more than 12 yrs. But tata docomo decided to stop their cdma services and they informed their customer. After taking decision they have to give option their customer whether they want to convert their number in gsm with tata docomo or not.
But they dont gave or covert their accounts in gsm.
And when i tried to port my number i got unique porting code start with ctm..
Code start with c it means number is belong to company. When my company never gave me this number or never paid me for this number. How my number register under any company. I tried to contact them through email through customer care but no one is ready to help. And finally when i came to know under which company my number is register (Its surprise for me) my personal name is register as company at their end.

But till that time company stopped my services. So now i am stuckup. How to resolve this issue can any one will suggest.
I am writing them mails but no one is responding.