Vodafone India — regarding deposit refund!

Address:	Sangli, Maharashtra, 416416
Website:	www.vodafone.in/home-mhngoa?section=consumer

I am a premium customer for vodafone india and have been using the number from bpl mobile days. My mobile no. Is [protected], [protected]
Bpl mobile got merged to hutch and now its named as vodafone.

My issue is i had a deposit of amount rs 8000 in total for all my family numbers (8000 rs balance can be seen on [protected] mobile no.) i. E. Total of 5 vodafone numbers from year[protected]. Even after continuously requesting the company service center, toll free no. And nodal officer for refund they didn't provide me my deposit saying i have to either switch to prepaid account or port out from vodafone or close the connection completely for all numbers. My point was that the company doesn't need so much amount of money for deposit purpose and they should refund me all when i am using it for more than 18 years now.
But i followed their instructions and around 1 year ago i switched all my mobile numbers to prepaid account. But its been almost more than a year now and still they are not providing me my deposit amount i paid to them.
I request to please refund my deposit amount and also the interest for it as the company used the money for almost 18+ years