Can I claim reinstatement and compensation for wrongful termination?

I worked for seven years at FirstCry as a service engineer, where I addressed product-related issues through doorstep service, traveling 70 to 100 km daily by bike. After seven years, I developed sacroiliitis and back pain, which sometimes prevented me from walking or driving due to continuous commuting in Mumbai traffic. I shared my MRI report with HR and my manager, who was advised by my doctor to rest and avoid biking for a few days. Despite this, my manager continued to assign me requests and ignored my repeated pleas regarding my condition. Subsequently, I was terminated, and I found that my 40 paid leave days had disappeared. I received an email stating my last day at FirstCry while I was on the field. I visited the Labor Commissioner’s office in Bandra, where I was given two forms: A Demand for Reinstatement and an Intervention Letter.