how else can i unlock my pattern on my galaxy mega if the hard reset doesnt work?

I have a samsung galaxy mega and forgot my pattern password. Ive hard reset it where u hold the volume up, home, and power keys at the same time and nothing happens. No matter how long or short of a time i hold them for. PLEASE SOME HELP ME AND TELL ME WHAT ELSE I CAN DO ASAP!!!! Thanks!!

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