Check spam, wait a moment, then use the resend option.
Codes usually arrive within a minute. Check your spam folder, and make sure the email address you entered is the one you booked with.
The code screen has a resend option once a short countdown finishes. If codes still aren't arriving, email support@pillowcase.io.
Email support@pillowcase.io with your campsite name or booking reference and we'll pick it up from there.