Vodacom ignorance

I cancelled all contracts on my name a year ago since then they tried to put through debits order on my bank for i dont know what for (All has been cancelled) AND ON PAY AS U GO .Receiving draft summons letters that they dont answer e mails or number advertised doesnt excist and a company harassing me on phone calls to me when trying to explain no answer Can hellopeter please connect me to the right person in vodacom After more than 15 years with vodacom it seams its time to migrate my number to opposition