Vodafone India — minus balance for prepaid number

Address:

395009

Without my knowledge my balance is -103 and due to that i am not even able to port my number. I do recharge for unlimited calling everymonth. Have no idea how and for what services they have deducted amount.. Also customer care is rude.. Not providing any details on deduction stating that it has occured long back and they do not have track of it. Even after trying to get in touch with vodafone customer care there is no resolution on my issue.. Customer care is totally improfessional and impolite.