Funeral policy canceled but still getting billed

I have been a vodacom customer for almost 8 years now but I am looking to stop all 4 my contracts with them due to the simple fact that they are *****ing from me every single month. I canceled a vodacom life funeral policy in September 2017 but up to today I get billed for a funeral policy that is not active. In an attempt to get this problem sorted I am stuck in a endless loop I have 2 ref numbers 1- ********** ********** and 1- ********** ********** both stating that the issue has been resolved but I still get billed. When try to contact vodacom with this regard I am being transvered from call center to call center only to end up where I started every time having to explain what is going on and no one trying to assist in this matter. Vodacom is leaving me no choice but to stop my contracts that is luckily all ending in the next 6 months.