Okay, so I have bought another key from a user on this website, but 1 hour later, I go of say for the night, try going back on and I am banned! I do not know why this is, obviously something keep stealing my key & getting me banned / Someone has access to my steam account (which they don't) or I am being hacked.

Anyone who can help me with this, I will send you money via paypal to fix, because this is a joke! Please help me out! thanks guys.