FAULTY CELL PHONE HUAWEI Y330

I don't even know where to start, very upset and angry. I bought this Huawei Y330 on Friday the 21 August 2015, was fine on Friday, on Saturday it started fading out on screen in such that I can't even read my messages. Was not around Richards Bay to take the phone back to store. On Monday I spoke with a lady at Foschini Head Office and told her about my trouble about the phone, she wanted to sell me insurance, I told not interested where I bought a faulty phone. She advised that I take it back to store in a pack and every thing I should be given a new phone since the trouble started with 7 day. Surprise, surprise when I got there I was told stories and that replacement is impossible with Voda phones only MTN phones, anyway the ladies said she'll speak to whoever, finally she told me, it's correct I should be getting a new phone but the supplier (Huawei would like to have the phone first to verify whatever before they make that decision to replace or not to replace. That will take 7-14 day, huh? This is not on. There is no physical damage to the phone, I did not damage it, now it must be sent for repairs and I wait 14 days? Very angry very disappointed!