I am a federal government employee who documented a work related injury back in 2006 and submitted all the correct forms

Customer: I am a federal government employee who documented a work related injury back in 2006 and submitted all the correct forms and followed the procedures of my employer. They did not follow their own guidelines for reporting Public Servants claims so WCB was not notified. I was unaware that WCB should have been notified, as it was a repetitive stress injury. I continued to update my condition over a number of years and various remedies were tried by my employer to help me with the medical issue. As it developed over time, someone mentioned that I should submit to WCB. So I did. Unfortunately they claimed that my employer failed to report it within the deadlines to report, so I do not have coverage and am struggling to stay at work on the medications required. Is my employer liable for failing to follow their own policies and procedures to protect me?
JA: Was the injury discussed with a manager or HR? Or with a lawyer?
Customer: Yes. My immediate supervisor(s) over the years were involved with remedies and all forms were submitted to the proper departments and signed off by supervisors.
JA: Is the workplace "at will" or union? Is the job hourly or salaried?
Customer: I am salaried.
JA: Is there anything else the Lawyer should know before I connect you? Rest assured that they'll be able to help you.
Customer: I have tons of documentation and timelines documented. I was attempting to seek assistance through the union grievance process and have exhausted the original grievance. It is at level 3 in Ottawa. I now have a grievance in for failure to provide an Accommodation which has been ongoing since 2018. I have seen both my personal family doctor and managements Health Canada doctor, who both agree on the accommodation. Management is not complying with medical opinions and has been bouncing the ball since June of 2018.