Vodacom contract sucks

I've had contract but haven't been treated this bad, I remember two years back I went to makro at woodmead, I bought 2 tablet in which I struggled with the other tablets number. I ended up quiting since there was back and forth after trying calling and sending email to fix the problem. I continued paying for the tablet. I knew my contract is ending September this year, after I went to lenasia vodacom shop to find out there's no source of communication with vodacom since I owned the tablet till today. Everytime I had to communicate or find help it will be me calling in or going to the shop. Around October I called in to cancel was told to go to the shop and at the shop was given the number to call, when I call it will be back and forth again. I finally got helped at makro in albarton where I was advices to email councelation department. My contract ended September. The tablets are no nolonger work but their still deducting money from my account, for which contract I don't know. With who's arrangement or agreement I don't know. I remember calling in and one of the consultants told me the don't cancel but upgrade at vodacom, I thought is a joke until I experienced this. Very bad costomer service to them what matters is money coming in. Tell me what am I paying for from October till now.