Wrong account merged
I have 2 SPG accounts and I have requested SPG to merge the SECOND account into my FIRST account. Now, the merge has been completed but they made a HUGE mistake of merging my FIRST account into my SECOND account because I linked my Marriott account to my SECOND account (at that point of time, I didn't realize I have an existing SPG account). I specifically requested that my SECOND account to be merged into my FIRST account via their website.
My question is, how to undo the merge? I am beyond livid at this point. The least they can do is CONTACT me BEFORE making the decision on their own. I specifically requested that my SECOND account to be merged into my FIRST account. What can I do? Ugh.