Hi Anil,
Thanks for your reply. I will make a note to bring all my relevant documents of the medical condition when I am back to work. I have informed the lead on a daily basis about my condition. When there was no considerable improvement in my health, I was advised by the doctor to take complete rest and to go for further diagnosis. The best option can be only at home because apart from medication, precaution is also a must. When I asked permission for this, I don't know what went wrong, and his quote was, "I don't want to get into the technicality/criticality of your illness. I have given you time to recover; still, you are not well, so I can't run the business in the same way, and I am forced to mark you as absconding if you are not resuming your services." Just shocked to hear all this... and stressed too.
Hi, if you have informed your team leader about your inability to continue due to your illness and required leave, you just have to submit all your prescriptions/treatments and other relevant medical bills to your HR. But you must have taken the permission from him because you have to work under him upon your return. And as you said that your experience with them is not good, then you must look for a new job after some time and don't care about it... but if you are making excuses for your illness and are worried about this bad experience with them, I don't think you are on the right path.
Coming to the point, when you return and present a valid reason with your complete treatment/prescription/bills and other relevant medical documents to him, surely he will understand your situation and approve your leave. Also, you have to present the same documents to your HR for their work. Your team leader can't perform the job of an HR personnel but can guide you more because you have to work under him upon your return. Think about it first. Now you need to take proper medication... Take care and best of luck.