2 Answers

I'm with @Bob/PKB, you must mean "denial". See here:  de·ni·al

   [dih-nahy-uhl] Show IPA

noun 1. an assertion that something said, believed, alleged, etc., is false: Despite his denials, we knew he had taken the purse. The politician issued a denial of his opponent's charges.

2. refusal to believe a doctrine, theory, or the like.

3. disbelief in the existence or reality of a thing.

4. the refusal to satisfy a claim, request, desire, etc., or the refusal of a person making it.

5. refusal to recognize or acknowledge; a disowning or disavowal: the traitor's denial of his country; Peter's denial of Christ.

You probably mean "denial"   pronounced   DEE   NIGH   EL.   
Deny means, pretty much, "DID NOT!"  It is an abject discrediting of oneself from whatever the accusation might be.  
Other:    You cheated on the final exam      (accusation)
YOU:  I did not cheat.  I studied hard and knew the material.   (Denial)