Autozone (SABAT BATTERIES)

I bought a sabat car battery at Autozone brand new,with a 24month guarantee,the first 6months,it started giving problems, becoming flat,I took it back another 3times same problem, within my guarantee,and everytime they test it and say the battery needs to be charged but didn't want to replace it,so what I find out is,the reason they don't want to replace it is because they give you a charge then your battery is working great for a few months and back to the same problem,so in the meantime your guarantee date expires and now you have to buy a new battery,this was a really bad experience for I'll never ever would recommend anyone to buy batteries from them period,I'm still ****ed