my notes got locked unnecessarily and there is no option to change old notes passcode.

I have been stuck in a tough situation. help me as soon as possible. I have locked notes with a passcode and it usually opens with face lock but it is asking to get notes unlocked with a passcode. I have entered the correct passcode 1000 times still it is saying incorrect passcode. and they are no other way to open that notes. please help me as I have stored many financial and bank details there.