Amazon — locked out due to security reasons

Address:	New Delhi, Delhi, 110043
Website:	www.amazon.in/ap/signin

Around last two months i was not using my amazon account to buy any stuff as i did not needed and i think my cousins have done something that made me locked out of my amazon account i check to resolve this i came to a solution in amazon help, i applied all the tactics to resolve this case but nothing seems to happen and the error still shows. And due to this i was not able to buy products that i needed at that moment.

This is to bring you to notice that after all doing correctly as mentioned by the amazon help i am still been locked out of my amazon account and due to this i am not able to buy products.
Email id linked to my amazon account: dkmishra. [protected]@gmail.com