Why I pay twice for the same order?

It seems I have the same order for Premiere Pro (the same order number) on 2 different accounts - and becuase of that I am charged twice. It is not possible to get help from any Adobe Center - do you know how to solve the issue? I was about to cancel plan on 1 of 2 accounts but it seems there is cancelarion charge ... sorry but I feel this is unethical