Telkom Mobile Appalling Service

I bought Telkom mobile more nice 7 gig data and within fewer than 45 minutes all my data was depleted. I called the call center and I received no assistance regarding my complaint as the lady told me that she will have someone look into it but nothing was forthcoming. This was the second time that I lost my data over an unexplained reasons, but now their service is not only poor but also costly to use. Before load shedding they apologized for poor service and now they take it as their scapegoat. What should I do when the service provider cannot help but keep on getting away with such actions?, I am really appalled at their service and mad as hell because these service providers will do anything and everything to get their profit margins by any means possible at our expense. Where do they think we mine the money we buy these services with?, and just because we are able to buy airtime or data at times does not give them a chance to rob us.