[Q] Android hard reset

hello
Recently i have bought a tablet
penta ws702c
android ics 4.0.3
1 gb ram
1.2 ghz processor
it worked gr8
but have locked with pattern and i forgot :eek:
the wifi is disabled as well as phone data and also usb debugging mode is also disabled
too many attempts on pattern
tab has three buttons power vol up and vol down
:crying: locked out of my phone

please help my guys