Please, contact Envato Support regarding this issue. As far as we know it's possible to get a refund until you have downloaded the item using your TF account.
I allready contact them and Envato Support says i have to contact the author. I purchased now the Milano theme because i have to work on it. For the ChurcHope theme i have no use – so you recieved a present from me about $24.50. it would be nice if you would clear the money from ChurcHope theme with the Milano theme and I would get the difference back. Cheers Matt
All purchases are made through Envato marketplace and we don't have control over this. The issue with the wrong item purchase can be resolved on their end only.