Vodacom

I have a contract with vodacom, I took a phone, tablet and a laptop. I was paying R700 plus monthly. I saw on my contract that I was wrongfully billed for the devices that I dnt have. I asked them to cancel it but they recently sent me a statement with the very same bill. I've settled the laptop but they billed me also. I dnt get help from their customer service and even at their shops they always tell me to call customer service. Am tired of vodacom because the only device I owe now it's a Huawei p30 lite which was a renewal from the tablet. The phone and laptop was longtime paid up but they bill me for it