Pretending repentance to someone you have a terrible wrong(s) against, by just saying, "I treated you roughly." Is not owning your sin. You must confess, if possible to them the depth and level of your wickedness against them as you know it in your heart and certainly to YHVH, hiding nothing; for nothing is hidden from Him. Repentance precedes forgiveness. No repentance - the demons stay and the sins are NOT forgiven.
If the persons or people you have knowingly sinned against, are such that there is no contact or they have moved away or passed on, you must confess them in detail, in true penance from your heart to Yeshua and or our Heavenly Father.
What is the sure sign of deliverance of a soul? They agonize of their past sins to every soul they have wronged, openly owning them all, hiding nothing. No sign of that, and you have a falsity on your hands and they are NONE.