Hi @asuksharp
You should be able to unlock the phone through your Google Account.
If you keep getting the pattern incorrect after multiple attempts, forgotten pattern will come up on the screen, tap on this and enter your Google account name and password used when you set up the phone. If you get the PIN incorrect, you should be able to get your PUK code from Vodafone, if the phone is SIM locked through too many incorrect attempts, you will need a replacement SIM for the same number from a Vodafone Store.
When you have unlocked the phone, I would suggest setting up a new memorable pattern or factory resetting to erase all memory of the previous pattern and phone security.
There is also further information from Google to explain how to unlock your device or reset your pattern on the links below:
Google Support
How to Unlock Android Phone with Google Account
