AR and AS - job. What should i do?

I was operated two years ago for chd submembrane resection . Now I am applied for job after finishing studies. My doctors told me that I cannot do physically strenuous job but the firm doesn't involve any physically strenuous job and still they are not allowing me for job stating that I am not medically fit despite my cardiologists medical certificate. They told me to do a 2d echo at their specialist and he told that I will need valve replacement surgery in few years. I was worried and I went to my surgeon who analysed and said it's not guaranteed that I will need surgery may be if the leakage of valve increases. Currently it is in mild AR and AS so no need to worry . But still the HRs and doctors of the firm are not listening and being a software development and a desk type job they are not considering me after clearing the interview . What should i do ?