EXCHANGE DENIED AND BAD CUSTOMER SERVICE

I bought 2 phones on Easter Sunday.The cashier only switched on the phones,going to the welcome language screens before handing them over and having me sign for them.When I went home - after downloading 2 apps,the screen would blank out and become white. I could not switch it off, and had to resort to removing the battery in order to clear this and switch the phone back on. This carried on until this morning; when we decided it would be best to exchange the phone before the 7 days was up as per the till slip on exchange/refunds.When I went to the store,I spoke to Vuyisile who had in part assisted us yesterday -I explained what the issue was and my wish to exchange the phone, he then went to speak to the person in charge Uylene Schoeman who rudely advised me that I could neither exchange nor get a refund for the phone as the person who could permit this was in Zambia. And as the phone was not doing the error at that time, they were not willing to help instead directing me to mtn, she also proceeded to leave me after giving me the call centre no as I was not happy with her treatment, all I wanted was to exchange the phone but she brushed off my concerns with no acknowledgement.