If you have been paying the rent against proper receipt and those receipts are with you than why would you need to get NDC. Is there any such clause in agreement.
Just issue written notice to your landlord and state therein that you have fully paid your dues and there is nothing outstanding against you in lieu of your rented accommodation, state therein that you are handing over the property and vacating form such date… just send on his email and watsup and keep the screen shot of watsup with blue ticks and send the hard copy through registered post with AD.
Mention that after 15 days with no demand or objection the Notice shall be treated as admitted and accepted.