Unfair Billing

i have not used my Dstv since i disconnected it on the 27th of February because i was moving out from where i was staying and on the 27th is my billing day i dint pay the account as i was but was moving out ans since from that day the Dstv is still disconnected, But now im surprised when i receive a call from Dstv saying that i owe the account while i was not using the service as it is still disconnected even now and what the do normally when you dont pay the account at your bill day they suspend the account but now they did not suspend and they can also see on their system that the Dstv was disconnected from the 27th what am i paying for as i was not using the account? and why as usual my account did not get suspended? when they dint receive my payment as you have to pay before you use the service, that way i have to pay a re-connection fee for me to use the service. this is pathetic coming from multichoice and i will be cancelling this service