No debit order disputes?

I have debit order mandates for pertculer dates agreed with my collectors. As this is very important for me because i get paid fortnight. I recently discovered that Capitec now does not allow debit order disputes anymore and collectors just go in my account on any date without my concent to debit my account. I called Capitec bank to find out why this is happening. All the lady says to is mandatory debit orders can not be disputed. Without even asking who she is speaking to or even go in my account to check what is happening. I find this very disturbing Capitec for not keeping us in control as they promised