Overcharged by Vodacom NO FEEDBACK

In June Vodacom deducted a double payment. After repoting, many phonecalls and emails to Customer care and proof of payment dept my problem is still not sorted. They just dont answer me back. They did say payment in March was not received. I send them banking statements for Feb Mar Apr and May toe prove payment but since then, no responce from them. Its frustrating because u can't speak to anyone at accounts, only customer care. U have to explain your story every time u phone! After more than 17 years with Vodacom this is what I get no response. If my upgrade was due I would move.