Errors in billing

I canceled my policy, on the 18th of May, as I was leaving the country for contract work. However when I checked my account in August I saw that the deductions had still gone down on my account.

I called the call center on the, 3rd of August, from overseas and was told that they will sort out the error and have the money paid into my account. I was hopeful however on the 13th of August the money is still not in my account.

I called again and was told that because they are experiencing high call volumes they will call me back. I asked if they will call me back on my overseas number and was told that they would.

It is the 14th and still no call, why must I pay R6.25 per minute to get YOU to fix YOUR error? I have spent 20 min on the phone already, must I carry that costs?