Netstar- one month Cancellation means an extra month

I sent notice of cancellation received the following mail, However i still need to pay for an additional month Please note your ticket has been resolved from our customer service department. I've forwarded your request to our Retentions Team; they will call you within 24-48hrs. You can follow up on your query by calling them on *** or ***. Your reference is: CAS-***-B6W1