Swollen S4 Battery and bad support received

My S4 Active battery has swollen up and when I went to the Vodacom World Samsung store I found that they could no longer assist with product repairs/warranties. I was told to go to the Sandton City store. When I called the Sandton City, Fourways and Rosebank stores I was told that they did not have stock and could not assist me and I should go to Samsung Support at The Wedge. I could not find any details for this store on Samsung's website so I called the Samsung support line who provided me with the contact details for the store and advised that they can assist with the problem.<br> <br> I called the store who answered the phone as M M All Electronics which is very confusing to a customer expecting to contact Samsung. I advised them of the problem and was told that they had stock of the batteries and they will replace the battery. When I arrived at the store I was surprised to hear that it's my fault and that they can't assist me and I will have to buy a new battery. This was without looking at the phone, I was told the device was out of warranty. How can they know my phone is out of warranty without even looking at the serial number?<br> <br> This is reallly bad support from Samsung.