DISGUSTED IN VODACOM SERVICE

I opened a2nd account with Vodacom last year somehow they got banking details of my bank acc and debit that acc, acc went into arrears i queried it for a long time, long story short last year i paid up arrears informed them to change banking details to same acc no i have on first acc i have with them confirmed banking details etc, they still kept on debiting new acc, end of last month debit wrong acc there was no money in it(i told them i won't always have money in that acc hence I'm changing it they still ignored me) now i must pay R100. 88 penalty fee, this is a disgrace, i called few minutes ago, spoke to a lady by the name of Rhetabile i ask her who will assist me regarding this, she said no one... There is No customer service, I'm furious disappointed in Vodacom!!! PS: my other acc with them is up to date, So...