I am unhappy with the quality of the 5 kg hake I purchased from Roots butchery

I am unhappy with the quality of the 5 kg hake I purchased from Roots butchery . The fish was extremely rubbery in some part of it and not suitable for the quality I expected. I returned the remaining fish to the store, but unfortunately, I was refused assistance because 14 days had passed.I asked for the manager and he refused and one of the staff member said the manager is busy I must wait. I waited about 20 minutes. And I asked again the said the manager is busy fixing the roof his on top of the roof. Another male staff member came to me and said they can't help me because is been 14 days. There is rules and regulations I was supposed to return the hake in 48 hours not 14 days after. I then expl that my hake menu was this week and I didn't know about the 48 hours. They didn't even look at the hake that I brought back. I even asked them to give me something else instead they refused. I paid R650 for it.

May you kindly assist Thank you