Require to return the Tablet

3rd Feb 2018 Edgars Sandton, Husband bought a Samsung Tab E, however I was at Northgate Mall and I also bought the same Tablet. Now we have two Tablets we do not require, my daughter who is using the Tablet for School took the one I bought already to school and I need to return the Tablet and they refused to take it unless it is OBF. That is ridiculous I don't need the other Tablet it's still in the Box and not used at all. As customer I believe I have right to a 7 day service and return if I am not interested on the material. However for now it has nothing to do with the service but just that we don't require it as we have two of the same product. I need assistance on this what should I do, as I need a refund.