Tablet not fixed for one year now

We gave our tablet in at Telkom last year August. the tablet only worked while charging. it freezes and shut down for no reason. 3 weeks later it was sent back not fixed. we gave it back to Telkom the next day and they came back and said we must pay for a new battery. when we handed it in the first time, was the battery still under warranty. we have been paying non stop still monthly for our tablet which we cannot use at all it is lying at Telkom for a YEAR NOW. Telkom keeps on referring us around. The issue is Telkom was responsible to fix the battery the first time we handed it in but they waited till the warranty expired. Telkom gave us some of the money back for the months we paid, but not all the months, we are still paying for a tablet we do not have or are not using. No one wants to assist us, we do not know where to go anymore. Please assist us. Do we contact the newspapers or what.