Can't able to buy itunes store with several problems

Question

As I mentioned before,
, it appears that of your devices was linked to possible unauthorized activity on the iTunes Store.
Because of this, I strongly recommend using a different device or computer to use the iTunes Store.
Additionally, it appears that your account is not in compliance with the iTunes Store Terms and Conditions, so we will not be able to resolve the error message you’ve encountered.
This is the message form apple support.
I explained them, i just bought iphone 5 second hand and started my own account and filled 200USD with itunes gift cards and i went local repair shop for my iphone 5 Home sleep mode bottom is not working. and after that, i clicked purchased a game and apple wouldn't let me, it said ( contact support ). I contacted them and explained and wait almost about 3 days their reply as i showed about that message.But i can purchase all free apps without problems but i changed my password to be secure and then i must need to verify my payment and i clicked none (because i have money in my credit store). however it said contact support. Now i am doomed , my account and my phone is useless now. Apple senior adviser strongly recommended i am better change devices to use.
What a nice recommend! I am not rich , that's why i bought second hand iphone and get doomed. if i am able to buy other devices to use , how i contact apple for wasting my time. and the next is if i sell this phone again to others, the buyers will get troubles like me. I don't also know my device was linked to possible unauthorized activity on the iTunes Store. and the next thing is my account is not compliance with itunes store terms and conditions. I set my valid US address ,but i used it from over sea. Millions of US people used to buy itunes store from oversea , why i am the only one person that getting trouble.
Please suggest me and advice me ,. I hope apple staffs saw my message
Thank you

Answer 1

We are fellow users here on these forums, you're not talking to iTunes Support nor Apple.
If you were using the US store when you weren't in the US then you are violating the store's terms of use (which you agreed to) :
The iTunes Service is available to you only in the United States, its territories, and possessions. You agree not to use or attempt to use the iTunes Service from outside these locations. Apple may use technologies to verify your compliance.
If you were using your phone to purchase content from the US store when not in the US then that might be the unauthorised activity that they are referring to. If you contact iTunes Support and ask them to remove the balance from your account so that you can put your correct address on your account (you can't change countries whilst you have a balance) then you might be able to use the account.