You can log in to your account and update the contact information. You should ask your agent if he/she already sent the sp2. If not, just download the form and fill it up, make sure you follow all instructions and make sure your file number is correct, then email it to
mpnpsupporter@gov.mb.ca with the proof of relationship documents like the birth certificate and marriage certificates. Its really simple to apply on your own and no extra expense. These agents sometimes complicate the application and try to squeeze all the money they can from applicants.