Airtel
Cash wrongly deposited to pre-paid numbe

I am having three connections of airtel in my name (two corporate and one personal). All are post-paid. Recently while depositing bill in cash, I wrongly deposted Rs.250/- to one of my airtel's account which I got changed to post-paid recently. Now I want that the amount deposited in pre-paid connection is transferred to one post-paid connection. I talked to customer care on phone, they advised to contact the outlet where the cash was deposited. The outlet say they cannot do anything now. Please advise whom to be contacted who can resolve the thing. No. to which the bill is paid wrongly is 9810397519 (pre-paid). No to which the amount has to be transferred is 9958195639.