Reduced data signal quality in Rustenburg

In the last few weeks, the data signal continually reduced, up to a point where it takes an hour for simple downloads. When I reported my dissatisfaction, the call centre agent treated my like a retard. I have two data simcards and use it with Samsung Tablets. Something changed recently and Vodacom needs to fix it, I am a paying customer and I am now paying for a very poor product. Vodacom is no longer the network for smartphones, as they claim.