Wrong billing

<p><span style="color: #555555; background-color: #ffffff;">I hired a car through my Voyager point but Avis have gone ahead and charged me on my credit Card. I have called 3 times at midrand grand airport to have my query resolved and they keep saying they will Came back. It's 2 weeks now and my query is not resolved. Voucher ***9Za3</span></p>