Paying for their mistake

I joined Discovery health and pertinently stated that the starting date should be moved from the 1st of Jan to the 1st of Feb 2015.. January went by and I am under the impression that all is fine.. February came and I found myself at the airport trying to buy a sandwich for breakfast only to be humiliated because a R40 transaction gets declined. I investigated and found that Discovery Health cleared out my account by debiting 2 months premiums, one for Jan and one for Feb, leaving me hungry and pretty upset! I then put a call to them which they responded by saying it will be rectified and I will be reimbursed within 7 days.. Ten days later I had to contact them again where they responded that the request was never processed from my previous call and I will have to wait another 3 days for this money that I have been ****** of.. I have other bills to pay with it and the non payment of those accounts are damaging my financial reputation and even after explaining this, there seems to be no urgency!!! Quick to take money but very sluggish in rectifying their ***** ups!!! Unacceptable!!!!