Tables Phone

I bought a new tables December 2025 and I stopped working June 2026 ,I took to Vodacom for repair since it is still under warranty they fixed it and it stopped working after 3 weeks again I returned it they fixed it again and it stopped working after a week again,I returned it and told them to exchange it because they are failing to fix it and the manger agreed and told me he will contact head office,I waited for almost two weeks again and they called me that they received the new phone , I went to the shop and they unsealed the box only to find out they put old tablet inside the box and I told them I don't want it because they promised to exchange the tablets with the new one. So I don't know what to do anymore please help me My number is *** Refilwe