FIsh dying within few hours of purchase with no refund

Hi guys! On Tuesday morning at around 9am on the 13th of August 2024, I went to Bluff Pet Shop & Pooch Parlour to purchase some Rope Fish. They had 6 in the tank left at R192 each. Since I already bought 1 Rope Fish over one year ago elsewhere; and have been looking to buy more ever since, I decided to buy all 6 Rope Fish at Bluff Pet Shot (located at Shop 9, Wentmore Shopping Centre, 237 Brighton Rd, Bluff, Durban, 4052 / contact ***). I have been a customer for over 20 years, buying all my pet foods and supplies here (and now and again some fish). When I arrived home, I placed the bag with the Rope Fish in my fish tank where I have my other Rope Fish. I have been keeping fish my whole life; and I know that the right way to introduce new fish to a tank is to let the closed bag float for about 15-20mins before releasing the new fish into the aquarium. Within the first hour of releasing the new Rope Fish into my aquarium where I have kept my Rope Fish for just over one year, 1 of the new Rope Fish started floating; and within 4 hours I had 3 dead Rope Fish from the new batch of 6 that I bought at Bluff Pet Shop (while the balance of the new batch is also not looking to good, but at least they still alive after 12hours). I phoned the owner of Bluff Pet Shop and told him about my experience; and he bluntly told me that he has a no refund policy on sold livestock; yet there is no notice in the shop of a no refund policy; and when I asked him where is the notice of a no refund policy, he told me that is his policy and he does not need to display or advertise it. Furthermore, he didn't want to hear anything else I had to say, accept to keep telling me about his no refund policy. This is not how one should do business, especially treating a customer of over 20years in such manner. I spend almost R1'400 on the 13th of August 2024 at Bluff Pet Shop; with a lost of 3 Rope Fish to the value of R600; and I am told there is no refund once I leave the shop with livestock. I must honestly say, the staff is friendly, helpful, and respectful to all customers I have noticed, but as for the owner, that's a different story. I'm especially disappointed that he could not even say to me that he would do a parcel refund at least. Please double check all live stock you purchase from Bluff Pet Shop and Pooch Parlour, if you are planning on doing so.