Bro, hang out more at the mobile phone garage sales section, and you will know the market price and good sellers already. Dont need to buy from shops. Lowyat has the best deal. Or directd if youre staying at Subang area.Not hard to go there. Just take train to subang ktm, and walk 15 mins to the shop

From your post, i suspect you got a fake one, because ap set should be exactly having the same home button and camera location as the original one. If i were you i would have asked for a refund, and try my best to get back as much as i can. Then i will use the money to buy another phone from safe trader here.