You have 2 options for this:
1) Follow the link in the menu. You will be taken to a landing page where you can request a download link.
2) Write us an email or contact us via the contact form.
You can return your order within 30 days without giving a reason. You have to bear the costs for the return.
Unfortunately, exchanges are not possible, but you can simply return the item and order a new one
Yes, you can find these in the Miscellaneous category or by entering the term voucher into the search mask.
myHodo vouchers are perfect if you want to give the recipient the flexibility to decide for themselves which product they want.