Vodafone India — Postpaid bill

Address:	Bangalore, Karnataka, 560037
Website:	www.vodafone.com

My vodafone plan 325 but this month i got the bill rs.1200. Usually i get 450 but from last 2 months i am getting more bill. I contacted to customer care they told that some plan is activated. I told them to deactivate but they didn't.
So i called to customer care again and i told if i get bill like this i will change the network. And the very next day i got the bill as 1200. But usually i get the bill on 7th but this month i got on 10th.
I spoke with customer care they told that if you continue using this network then we will reduce the bill.

Should i pay the bill or not?

Please revert me asap.