Vodacom power tab never works

<p> I have I bought this tab a while back I never got to enjoy it for an extended period. I have returned it about 5 times and each time they replacement it with a "new" one. I have a new one at the moment and it already has problems. They all have the same problem, they just refuse to charge all of a sudden then eventually switch off and never allow to switch on. </p> <p> </p> <p>For the number of times I alone have returned the tab, I can't be an isolated case. It looks like Vodacom is doing the exchange now because of warranty and once it expires they will refuse to help me where as I never got to use the device for more than 3 months. </p> <p> </p> <p>Ripp off big time, I can't even touch my efforts of always going to the store to report the device. </p>