For the credit with the Fido Refer-A-Friend program:
You must register on fido.ca/refer and complete your account profile to refer a friend.
Your friend(sister) must accept the referral within 45 days for both of you to be eligible.
You will both get the credit on your bill after their account has been active for 30 days. Depending on your cycle, it can take 30 to 60 days to appear. You can check the status of your referral by clicking on Referral History after you have logged into the Refer Your Friends homepage.
Both accounts need to be kept active and in good standing to be eligible.
Can you confirm all that? Are you able to see the status in your Referral History at the moment?