Incorrect amount taken off my account with no refund and poor customer service

<p>I recently rented a car from Avis/Budget at Port Elizabeth Airport. I had the incorrect amount come off my bank account and have had no response from Avis with regards to this. When I try call customer services, the automated response tells me that their lines are busy and to rather email as they respond within 24 hours. 10 days later with daily emails - I have heard nothing. </p> <p> </p> <p>I had contacted Avis customer services with regards to a query before this and they responded straight away, but the minute I needed a refund, they have proceeded to ignore me.</p> <p> </p>