March 2022, and still waiting a final decision, residing in Quebec.
I have sued them with Mandamus and nothing happened, despite that they didn't provide any arguments against it. In my Mandamus process, the next step for me is to wait 4-5 months and possibly even more for a judge to see my case, and then a court date will be set 12 months after her/she see it if my application isn't finalized yet.
The IRCC knows that the federal court is overwhelmed with immigration cases, and this long time for a court date to be set. Thus, they are choosing not to respond and just take as much time as possible before the court date.
In summary, Mandamus is useless as they are still able to take additional almost 2 years to process the case (from the date I contacted the lawyer). I paid close to 6k for nothing.
Your application is within the processing time wich is 29 months now...you paid money for nothing