my gas cooker went out when turned to 220% it a indest k647r g/c?

My gas cooker i used on tuesday turned it on to pr heat to 220 it before i cooked food in it.i was also using the stove which is also gas. i went to light another ring on the stove and the cooker let of an explosion becase the cooker which was light went off.i didn't smell the gas in the result of the oven going out becase the door was closed the whole time whislt it was pre heating.This resulted in myself being burnt on my hand a very shaken up.i don't want to use it again is it a manafactors fault.

tina fewtrell
August 2009