Vodafone — Bill not deposited.

I wanted to change my postpaid connection into prepaid, so I had visited vodafone care centre, Mulund(W) near Shoppers stop, they had told me that my bill is Rs.780 & I have to pay Rs.280 after deducting Rs.500 deposit. I had deposited Rs.280 in cash in one of the kiosk machine at vodafone cetre in Mulund(w). The amount is not updated yet and they are asking me to make the bill payment again. I have told this to the persons who were coming to me or calling me. Now they are continuosly calling me, harassing me & my family for the payment from last 3 months and there is no positive response for my resquests.

I'm attaching the message which I had received from vodafone after making the payment of Rs.280.
This message was received on 04th January 2009, Sunday at 7.20pm
We are processing your Bill payment of Rs. 280 by Cash. The amount will be credited to your Vodafone Account subject to verification.

have deposited 1054 rs. in cash in one of the vodafone mini store in shalimar garden ext - 2. The amount is not updated yet . i hav visited them thrice and made them several calls, every time they say i willl be done in 20 min. but the payment is not updated since past five days and all calls are barred inspite of making the payment before due dt. cust care ppl are not ready to help and asking to resolve on my own and they are asking me to make the bill payment again.there is no positive response for my resquests