Credit not reflecting as promised.

I purchased a 5GB+200minute roaming bundle when I was travelling in July. I was double charged and assured that my account would be credited for the error. On my statement, the double charge is still there and the credit does not reflect anywhere. As before, I see that I was double charged for the roaming bundle an amount of R1098 (double what the roaming bundle cost which is R549) When I got back from my trip overseas and when I look at my balances I saw the 5GB roaming data is unused and the 200 minutes is also unused. Meaning that I was automatically charged on coming back home. This is really frustrating and don’t expect to be messed around by what I thought was a reputable company (Vodacom). Really disappointed by the service I received regarding this matter, when I was told the matter was resolved and my account would be credited for the mistake. This is honestly a waste of time going back and forth.