Please follow these steps:

1. Go to the OK Cupid redemption page and enter the voucher code you got from Codashop.
2. Log in to your OK Cupid account or create one if you don't have it.
3. Once logged in, your voucher will automatically be applied, and you'll see a confirmation message.

To check your purchase history:

1. Go to the account menu and select "Settings."
2. Click on "Purchases."
3. You'll see details of your transactions.