Debit order customer and system harassment

This is the second time I have logged this complaint previously, and after Vodacom apologizing that this would not happen again, it has happened AGAIN!!!!<br> Vodacom requested I do a debit order with them which I agreed to and monthly the debit order goes off, and once again I get a insistent phone call from them to tell me I owe them R200 odd Rand considering my overall bill is way more than that and I have a debit order with Vodacom. I call the call centre as before and request they stop harassing me and fix their debit order challenges, they apologies with and said this is a system generated call and they will stop it. At least the message from the callcentre is better than before, as last time they told me my debit order bounced. Had 1 day free of phone calls from Vodacom but now they call every number I have harassing me for payment, even though they did debit my account. These system generated phone calls are a nuisance and should not be the problem of loyal debit order paying customers. Fix your internal debit order processing!!!! Another thing, trying to get hold of me now may be a challenge as I have a spam notification for vodacom calls