1.You will receive my full warranty that the code provided by us will be working 100% only if you allow ME to log into your account and redeem a code for you. If you decide to do that without me then you won't receive a warranty since you can redeem a code on some other account and claim it wasn't working. After purchase, it will take us up to 15 minutes to receive a wallet code.
2. All sales are final so a refund is not possible.
3. You are the only one responsible for your own account since using and playing in a different region is against Steam rules and they can punish you for that.