Makro Springfield park

Hallo there. Hope you are well.

Hoping you can help me please. I bought a Nikon Camera from Makro in Springfield park, Durban last year April. and I paid R13000 for it. Which is a debit order of R534.26 per month While doing photo shoots my camera started freezing and most of my photos are blur, which is kind of embarrassing when doing like family or birthday photos shoots. I didn't think there would be something wrong with the camera, thought maybe setting and also cause i was still learning the camera and getting used to it, I took my camera back to makro a few months ago, I asked the ladies at the returns counter how do we go about sorting this out, and she had a bad attitude about it and said she cant replace it, she will hv to send it away I will receive it back within 21 days. I did receive it bk within a week and they told me they didnt find fault. when I asked to speak to a manager, a lady phoned the manager to come to the front said theres a customer to serious you, so he asked the lady for me to come to the phone which I did, I asked him to please come to the front so I can talk to him face to face, and he said well I cant come see you now and sort the problem out because I am busy at the back in the warehouse. so much for customer service. I did a 21st birthday party photo shoot which most of my photos was also blurry and it froze, so I have to take the battery out for a little while and back in, since I've had the camera I've taken the battery in when I'm not using it, because I don't want battery acid to go onto the camera. All I want them to do is replace it for something else, something better. because I am paying for something that isn't even working properly. please help me. thanks Mandy