Hey! I was in the same boat as you last year however someone suggested I look into schools in the states because they have more options. Yesterday I received an accepted at the University of Buffalo with a whopping 3.0 cumulative gpa and no background in CSD! Similarly to you, I have extensive volunteer experience and currently work as a behavior clinician which I believe were the major factors that got me in. Also my letters and references definitely helped, so dont feel discouraged there is hope!!! If you have more questions reach out to me