Android changed my passcode and unlock my phone

Hello,
Today I was changing my passcode from a PIN and I can't unlock it. When I wanted to unlock my phone, I couldn't. I tried to unlock it 300 times with my new passcode and some old ones but nothing work. When I went to Android Device Manager I tried to change the passcode but it just told me that it's already locked and I don't need to lock it again. Then I tried something thru USB but I don't have USB Debugging on I don't know what to do. I can't even enter my SD because I don't have any SD Reader and Recovery Mode is different then other people have. I don't want to reset it into factory settings because I have a lot of important stuff on that phone...

Lenovo S60-a ( Android 5.0.2 Lollipop )

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