Vodafone India — Wrong bill statement generated

Address:	Hyderabad, Andhra Pradesh, 500084
Website:	www.vodafone.in/home-andhrapradesh?section=consumer

Though sim [protected] is blocked 2 month back, vodafone is still generating the bill without responding to any mail communication.

Asked to pay the due amount of 1600+ after knowing i have blocked the sim. And than generated a new bill for this month of amount 1400 though not for a single minute sim is used and asking in the same way. And when i mention i have done the last payment, they are mentioning like i need to go to vodafone store to block the number.
Than 2 month back how did they came to know i have blocked the sim if so.