my mother was principle applicant and my father was co applicant with herYou won't be able to contact the visa officer.
For your dad, you can email the Abu Dhabi visa office (you can email your mom's insurance policy also):
abu-dhabi-im-enquiry@international.gc.ca
For your mom, you can email the visa office for the region/state where she lives:
http://www.cic.gc.ca/english/information/offices/apply-where.asp
but his file went to UAE where processing time is 60days which is already exceeded
Should I sent same CSE enquiry to UAE visa office along with insurance policy?