I have got two acounts on adove, one with Google and other with Facebook and adove ID linked. How could I do to combine both into one single acount? I suppose I should delete one, but can't find the way.
As you have mentioned above, you have two accounts with Adobe. It is not possible to combine two Adobe accounts.
However, you can delete one of the Adobe account. Before that, I would suggest you to backup all your files in the account that you will be deleting. Once the account is deleted, you will no longer be able to access those files.