These are the ways to find out about your application as far as I now, the call center, ecase link and maybe web form through this link
http://www.cic.gc.ca/english/contacts/web-form.asp.
But you said you are Canadian and you live in Dubai, why did you send your application to CIC Mississauga? I thought Canadians can apply through the Embassy, I know that they can, but I am not sure if it is a must. On the other hand, if you application is submitted to CIC Mississauga, the first stage would be sponsor approval, and that happens in CIC Mississauga, so I don't think the embassy at this stage has any clue where is your application yet.
I know you are frustrated, so I suggest sending two web forms, one to Abu Dhabi embassy and the other to CIC Mississauga.
If you follow the link above, then click "Tell us more button" after selecting yes for the first question, you would be asked if your application is being processed outside Canada, if you click no, it will take you to web form that goes to CIC Mississauga, send them one, then repeat the process and select this time yes, then pick Abu Dhabi from the list and that would go to the Embassy in UAE.
CIC Mississauga will get back to you fast maybe within a week, however, Abu Dhabi may take 30 days
good luck