Amazon India — Restricted my account without any reason

Hello,
My order id[protected]
Recently I received an email stating my account is restricted to digital purchases. Wherein I never had any refund request?

I did requested for a return this month that too of Rs 200/300 and neither I have any other account.

Then why such harrassment? Whenever I am placing any order it's getting cancelled without any reason and all I am getting is the same response. I have sent multiple emails asking to reinstate the account as there is no refunds request but I do not receive any reply regarding this. Why can't I return a single item if the item is not compatible or of wrong size? Why kind of fraudulent activity is this.
This is my prime account and I place order every next day. I need to place an order now as well but you guys are cancelling my orders. Kindly reply and resolve this issue ASAP