Contact
A question about your card
The quickest answer is at the counter. The shop can see your stamps, add one that was missed, and sort out a card that has gone astray - Box of Cards cannot do any of that from here.
Your details, or stopping emails
Ask at the shop, or email the address above. See how your details are used.
Using Box of Cards for your business
There is a short form on the apply page. It comes straight to the same inbox, so either way works.