Poor service

Hi on Wednesday I went for a battery problem which was not starting the car I'm using in Richard's Bay branch and they tested the battery and said my alternator is not charging and the problem is not the battery so I suggested to the guy that we take out one terminal from the battery and see if the car is gonna turn off, he said that's an old method it's no longer working so I left the branch. On Thursday again I came with my colleague's battery which I used to start the car and again they told me the problem is still the alternator even though my colleague's battery was starting the car but when I put their battery the car couldn't start and some guy whom I suppose is a supervisor came with the meter and also said it's the alternator not charging and told me to come back today (Saturday) to prove him wrong because the alternator will drain my colleague's battery and when I got there today( Saturday) they say I was supposed to charge the battery which they didn't tell, the only thing they said to me was that the alternator is not charging and they never said I must leave the battery with them so they can charge it. Devrin Swanepoel whom was not there on both Wednesday and Thursday today says his staff told me to charge or leave the battery with them to charge it and refused to give a battery to use while they're still charging mine because I had to return my colleague's one and was very disrespectful and full of attitude.