A message you send the studio by SMS or WhatsApp is deleted from the station's messaging system as soon as the presenter marks it as read, or one hour after it arrived, whichever is sooner.
What remains is your contact record — your number, the name you gave, how often and when you have messaged, and any presenter's note — and a delivery record holding the last three digits of your number. Both are deleted on request, below. Our privacy policy has the full picture.