Terrible service

I'm so disappointed in the service I received from you guys, I purchased a Galaxy A03 core from woolworths centurion mall and after about 2 months it gave me a problem, took it back to she shop was told I am unable to get a new phone, it was taken back to be fixed it took about 3 weeks to be fixed, it came back and after about a month and a half the phone became worse and I went back to centurion mall and I spoke to the manager about exchanging and maybe topping up because clearly can't get a assisted the manager by the name of Petrus Disolane told me there's nothing he can do I just have to keep on getting it fixed even though it is under 1 year warranty.as I am typing this I'm at woolworths again to try get this fixed I'm not happy with the service at all from such a prestigious and reputable entity.