Well im glad he was quick to make things right with you. Sounds like an honest mistake. Kinda sucks you didn't get the snake you wanted bc those colors were gorgeous ( but the one you have is still a cutie). As for how you feel about it, give yourself some time to digest what's happened and take your time on a decision. You don't have to know how you feel right away and that's perfectly ok.
sorry you had this mix up.