Poor Service from Samsung for a product they know to be faulty

I bought a Samsung Freestyle Projector and eventually bought a Samsung battery to use my Projector portable. It seems the battery is faulty seeing all the reviews for it, so when I took it to a Samsung store to resolve the matter they advised that no Samsung store assists with the battery and they also advised they know that these batteries are faulty and will stop working and charging. They said I should try the retail store in Bryanston for Samsung, when I went there they refused to take the battery in to assess it for faults as they said I had to hand my Projector in as well so they can test it. I do not see how they cannot test it on their side with their own products but I must now be prevented from using my Projector so that they can test a portable battery that is known for being faulty and not working. The worst customer service by Samsung and the fact I am now sitting with a portable battery that no longer works even when Samsung know these batteries have been faulty so I now lost money on this product as well. Extremely poor Samsung.