Disappointed with nedbank

My debit did not go out this month. I tried and tried getting hold of the department unsuccessful. I used up every resource including my airtime. How do you want us to get hold of you if it's impossible. I'm being responsible trying to call, to make sure my debt is payed off. There must be some kind of help customers can get. This is the first bank where it's impossible. Let you don't pay, they will be hounding. Nedbank needs to be accountable because I'm.