Very Unfair Treatment

I bought a Samsung Galaxy J1 phone at Game on 16/8/15. Today 24/1/16 the battery packed up. Travelled 15 kms to Game in Tableview to request they replace the battery. After waiting 45 minutes the Assistant said they do not replace batteries which she checked was faulty but not included in the Guarantee and suggested we try certain stores in Bayside to buy one. After trying 3 we eventually found one at Cell World which is a generic battery. Had we not found this would have had to go to Samsung in Canal Walk and we are Pensioners who cannot afford all these travel expenses. However I fear the fact the battery purchased is not an original part and this will probably violate the conditions of the guarantee. In terms of the Consumer Protection Act, I have been advised that if a product mulfunctions within 6 months of date of purchase then the Supplier must replace the goods or refund the sale price of the goods. The battery bought today does not seem to be working so I would appreciate a refund of R1399.00 and would rather buy a phone at Samsung than deal with Game again. Please do the decent thing and give us a refund.