Angry, furious and unsatisfied customer

I'm so so disappointment with the level of service I've received from Vodacom. If possible I wish to cancel my entire sims with the company and switch to a much better and reliable network provider. I cancelled my *** contract to prepaid on the 3rd Sep and I was advised September would be my last debit. To my surprise I've received my October statement and it shows that I need to pay R324.99, which is even higher then the usual amount I used to pay. Firstly I haven't even used or rather received your monthly airtime ect for October so what am I pay for exactly???? Your guys are reaping customers off and even offer pathetic service on top of that. I've just recharged with R50 and yet no airtime has been allocated, like why are you robbing customers like this. I need this sorted out ASAP and the October bill erased from your books as I owe you guys nothing cause to my knowledge my contract is cancelled and September was my last debit. I was advised yesterday that my matter has been escalated so should you guys dare debit my account this month I will take it up with the Ombudsman.