Highly disappointed by the **************** of this company

Am entitled disappointment by Vodafone, I have two contracts with Vodafone one for data and the other for work it’s a 3 in 1. As a Vodacom customer I took a contract on data 20 gigs day and 20 gigs night. I’ve been paying via debit order just a few months ago I had financial difficulties in which when they debit on my account I didn’t have funds of which within 10 days I paid my bill every month without fail, as I was about to close my account this month all of a sudden I owe R497 that I don’t even know how I owe it. I call the call center and the lady who assisted me say those are monthly penalties for missing a debit order an amount more than R110 a month😡😡😡how insane is that, I don’t dispute I made late payments but why so much money for missing a debit order. This is not my first contract I had one like this with MTN , even when my payment was late I had R10 .00 penalties. I don’t understand why would vodacom do this to it’s customers when we the ones choosing their network. I think I’ve learnt my lesson with them, I will no longer be their customers this is day light ******* for something I was never even made aware of. They must write this in their contract so that we know how they will rob us during our partnership. Truly am disappointed ☹️.