Unfortunately it really varies depending on the relevant recruiting cycle for that office. If you are a campus candidate (I.e., currently studying) then there is typically a set cycle and so if have been referred outside that period then there is a good chance you may not be contacted until much later.
Since you have not had any direct contact with the recruitment team, I would follow up with your referral and ask them to follow up for you. At this stage, I don't think there is an assurance that you will definitely be contacted by the recruitment team as MBBs don't always necessarily consider all referrals.
Fingers crossed!