Bought a blacklisted iphone 5s from the states?

My uncle bought my mom an Iphone 5s and he bought it for around 250 american and we paid for shipping which was 50 something to canada, it said its locked to sprint and when we took it to the unlocking serivice guy, he freaked out and said its stolen. I looked up the imei and it said its on the national blacklist, i can use it as an iphone but no calling service, what can i do about it? And the kijiji guy he bought from denies everything and we don't have proof of purchase or anything

Time stopped working in iPhone 5c?

The time on my iPhone 5c (AT&T) has quit working and hasn't fixed in a couple weeks. I have reset it multiple times and have no idea why it's doin it. I've heard time shift bug and other things. I set my time back… And date, from 9:24 pm 11/26/15 to the correct 7:07 pm 11/27/15 and it stayed at 7:07 for 40 minutes… I would appreciate any advice from anyone and no airplane mode has nothing to do with it.

My CD s that I put on my iTunes won't upload onto my iPhone, why?

I uploaded all my CD s onto my iTunes on my computer, I have the most updated version of iTunes. I plugged my iPhone in and its linked to my laptop but it will not let me put the songs on my phone, why? This has just been happening this month, it always has let me before.

How and where should I sell my cracked iPhone 6?

I would like to sell my gold iPhone 6 from T-Mobile but the screen is cracked and there are very minor scratches on the back.
I know the iPhone 6s came out a while ago but where should I sell the phone and how much should I sell it for?