I am on work permit in Canada and I applied for my spouse open work permit and my dependent son visitor Visa on 20th of March 2019. After 2 weeks my spouse got a passport request but my son application is separated from my spouse and they changed my son application from visitor to study permit on 16th April 2019 and ask me to pay additional $50 fee, which I submitted the same day and got an acknowledgement letter. Since than 2.5 months are gone no updated. Please advice