And your teaching methods are also not good. You are not providing solution's video for questions, notes in PDF (to revise concept in the absence of phone ) and flashcards (for learning formulae, concept etc in very short period of time).
Hi Dear,
There are many courses offered by different institutes in India. As per the information provided by you, it is not clear about the course you have purchased. However, Most of the courses gives option to get your doubts cleared through faculty or supportive system.
You are kindly requested to mention more details about the course you have purchased so that I can help you with the source from you can get your doubts cleared.
Good Luck