Vodacom incompetence when fixing their mistakes

So I was applying for a vodacom Friday deal. In the e-mail confirming my application it said to wait 24hours if no one calls me. I called in after the wait and was told application was declined. She tried again and was declined again. It stated I was declined due to a missed payment on an existing ontract.

This missed payment was in no part my fault as my banking details were captured incorrectly on their side. Also, they initially billed me for two lines when, the other being a wrong number. I had that rectified after many calls. But now my status is negatively impacted by their mistakes. Not to mention the decline showing on my ITC record now.

This is completely unacceptable, as this should have been fixed when the errors were brought to light.