Account double debited

Hello Peter, I have a medical aid at Momentum Health. On the 6th of October I called to ask my debit order be on the 26th of every month. That didn't happen, instead they debited my account twice on the 02 November 2015. I called in the morning to clarify what happened I spoke to some lady and she told me my account was not debited in October 2015 - I told her that a debit order did go through on the 5th of October 2015. She said I must email a proof of payment and my account would be refunded - I did. When I called at 13:30pm to ask how far the progress the other lady asked my reference which I gave to her as ***, then she told me to send her my bank statement to prove the double debit order. My problem is in the morning they told me to give them prove it was paid in October which I did now they are coming with other excuses not to pay my money. How do I send strangers my bank statement? Please help to get my money from these ****** <br>