Contract renewed without permission

I had a contract with Vodacom which was subsequently cancelled. I am now receiving statements saying I am on a new contract with Vodacom and owe R220. My number has been ported and I am no longer with Vodacom. I have tried contacting your call centre to no avail as every time I enter the number it tells me the number is invalid. There are hundreds of options to choose from and nothing pertains to my query. Please may someone contact me. I have tried all weekend to get someone to contact me but no one is getting back to me.