Refuses to Refund me after THEIR website crashed

On 29 November I did an online application for medical aid (360). I opted to pay in advance for one year and the total value is R3480 - I paid this with my credit card and this was deducted from my account (got the SMS notification immediately). But the website then gave me an error and said it couldn't complete the application.<br> <br> I called in and spent LONG on the phone with the website team and was eventually told the New Business department needs to deal with it and they're closed. SO I called back the Monday (30th) - I spent almost an hour on the phone and they had zero inclination to help me.<br> <br> Since then I have sent a total of 6 emails - mostly I am just ignored, but when I followed up they told me I need to send Proof of Payment. I ALREADY DID THIS IN AN ORIGINAL EMAIL. I then attached it AGAIN. They are simply ignoring me - this money is accruing interest. Why must I battle like this? Why is your customer service so SHOCKING!?!?! Even though I sent the POP nobody is helping me but I actually don't even like that I have to send it - I sent the error detail from the website (screenshots), I am an existing customer with a platinum credit card and medical aid. And I'm just ignored