I think you can send the proof of 24mos experience maybe it will help processing direct to stage 2. You can use your application no. In sending documents via mail or webform. Immigration consultants suggests that.
Looks like it was returned after more than a year but they gave him a application no. When they returned it I believed its the same as aor. He have the application no. Now
If you applied for HCCP single your payment fees must be around $1500. Did they returned back your paper with the reason why did they returned it? Or got the reason from email?
Hopefully they will fast track aor for applicants. I'm afraid that they will return my application due to quota last year. I'm inside Canada and I submitted October 21 2020.