How much would it cost?

I've got an iPhone 5 and I went to a phone shop because the top of the screen were popping out of the back so they glued it down, it cost me £5 that was a few months ago now it's popping out again and I can see A LOT of dust under there, how much would it cost to get a full new screen.

Ps I want a new not just because it's popping off but to match the back of my phone because the screen is white and the back it black.

Which colour Iphone should I get?

So hi guys. I need your help. I'm getting Iphone 6S tomorrow and I can't decide which colour to get space silver or rose gold. (i don't like the gold one). So help me decide it. I'm a girl but not a feminine but i'd be okay with both of the colors. So. Which would go with different cases well?
thanks <3

Added (1). sometimes feminine, sometimes not.

My iphone is unresponsive?

My iphone died last night after my charger broke. I woke up this morning purchased a new charger now my screen is completely black and the dead battery screen isn't coming on. SOMEONE Please Help ME