App Purchase not working

I am attempting to purchase the Sales/Purchase Order for my DO akaunting server. I am unable to complete payment. After I enter credit card I had gotten a card expired notice even tho I had input the correct date. I am unable to go to the akaunting.com/cards section and edit the card to make sure but I have also attempted to create a new card with the proper info and it still does not go through. Please help .

Hi Addison,

We have sent you an e-mail right now.