Hotpoint oven (SY36X) fusing the electrics of the whole house?

Please help...when the oven is switched on it fuses all my electrics, sometimes it will work for a few mins and then fuse everything but sometimes it fuses out straight away. Im wondering wether i should just buy a new oven or an element but not sure this is the right thing to do. Please if anyone could help me that would be great cos i need to cook a caserole lol.