Vodafone India — security deposit not returned

I have taken international roaming services in the starting in end of april for 14 days and same was closed in may 1 week. The company has taken rs.3000 security deposit which is to be returned post surrendering vodafone international services. But this never happened. I am following up for my money since then but they are not returning it and keep on adjusting against my upcoming bills. I demand my refund of deposit along with interest on amount for the period the money is not refunded to me. Further, i want compensation for the inconvenience caused to me. The company is just cheating and sitting on client's deposit. Money is nvere returned.