DEBIT ORDER WHILE THERE'S NO OUTSTANDING PAYMENTS

I did an early cancellation for my contract last month which is September and paid everything no outstanding amount is due now this month Vodacom they debited again I don't know what to do anymore cause the reason I cancelled this contract is I'm no longer working please Vodacom make the right thing Stop debiting my bank for nothing or you guys want me to have a Bad name for funny PLEASE STOP it's really draining.