Vodacom axtra costs on bills

I canceled two numbers last year. *** ref 337874 and *** ref 336015. And again as the previous time vodacom systems is pathetic because I ve got charged again on my bill for above numbers. When I call vodacom I were transfered from one to another and then eventually just cut off. Why is it necessary that I must first go to Hello Peter before Vodacom do the work they are supposed to do?