Charged for internet and device, contract cancelled

Your query has been escalated to one of our Solution Experts. Your ref number is: 1- ********** ********** Visit www.vodacom.co.za/app from your phone. Thank you, Vodacom [Service RequestOwner Group], 2 months now you are billing me, but it was cancelled 2 days after you supp**** me with the incorrect equipment in december around 22nd, however you loaded the contract in January 2018, and started billing me, I was at the branch, reported this to vosacom customer care, and still no response, 2 months later.