double charged on my account

On the 31.12.2015. my account was billed twice. The one debit order went through and the other one was returned as unpaid. Absa bank charged me for that. I called vodacom customer care and I was informed they are aware of the issue and will call me back shortly. Till today i'm the one following up and stil have not received any feedback. People i work with have received 500 data and their refunds. Iv been calling and taken from pillar to post. Here i was about to give a compliment regarding my phone even though my memory card was ******. I get this service. I'm not happy at all with the service i'm getting. I want this matter to be resolved a.s.a.p. Absa advised they have not received any communication from vodacom hence the complain<br>