Sad sad

My husband brought me a phone for my b.day but after just 2 months it stop charging. He took is back first they said its warranty is finished, but did take it to send to sumsung. When I fetch it they say it has water damage which is BS so they can't fix it. But after i fetch it it charge again but not with its own charger and went dead again. We told them at ackermans but the say they cant take it back nor give another phone but tell us to go to foreigners to get it fixed. Also the want us to pay for the courier of the phone to the manufacturer. Its just unfair the have to pay for it still on the bill and have it fixed by outsiders and pay for the courier. Why is there warranty on products? And Ackermans are not willing to meet halfway. We are willing to pay the rest of the bill but how can we pay for something not working after short period.