Course finalisation error

Last year, I completed a course with Red and Yellow. It is now over a year later and my certificate has not been finalised. Before I went on maternity leave last year in October, I made sure all documents and paper work was completed. They still have not issued my certificate. It is not clear on the system whether I even passed. There is no feedback regarding my certificate. I have repeatedly emailed them to request finalisation. Since the beginning of the course I realised that I am not receiving any of the course updates and communications, because my colleagues were receiving these emails and had to forward them to me. I have emailed the course administrators several times since then to request for the error to be rectified, because it has had an influence on my submissions and understanding of the course tasks. This started in April last year. Since then, there has been no rectification of the error, even though I provided two different email addresses that could have been used. I sent through my concerns via email at least 3 times and phoned over 3 times to speak to my facilitator. I was told they would phone me back, which happened only once, with no success for the error being rectified. I have to submit my certificate to my workplace to prove that I have completed the course. The delay in this process may present consequences for me at work.