battery fails to work within 4 month of purchase.

i bought a sabat battery in february 2015 at sosh spares. in june the battery was no longer lighting even the dash board. or charge a phone on a car charge. i return the battery and they test it. results on their machine were\CHARGE AND TEST".i left the battery for charge and came after 4 days. they test the battery again and the results were the same \""charge and test. BEN told me he will wait for the worker from sabat to change the battery because there was no stock of the same size. after a week i went back and the battery was not replaced by sabat PIET. AFTER another month i went to sosh spare to check again and i was told to come back the following day of 21/o7/2015 and i went on 23/07/2015. iwas told the cant change the battery because it has minor damages on the terminal. i was given an old battery for temporay use with the same condition as mine.i called the call centre on the battery "