My husband and I were referred to Public Mobile by the same person, and we both signed up on the same date. We each received a text message stating that we would each receive a $10 credit. My husband's account was credited with the $10 but my account was not credited with the $10.
It can take up to 72 hours for the credit. If you you still have not received it the submit a ticket to a moderator by clicking on the bubble on the bottom right.
Strange you didn't get it the same day as your husband. Follow @Triguy 's advice if you don't recieve it within 72 hours. If for some reason the referral code was not added to your account it would be perfectly reasonable to add your husband's referral code so he gets the monthly $1 reward.
the credit you will see it at your account up to 72 hours to post it ,
you can get to ticket opening quicker this way: