Electric oven installation

We need a new oven but cannot currently get it installed due to the plug being in the hot zone. We have had this blanked by an electrician but this also meant the cooker isolator was removed. Unsure of where we go from here? Do we need it all to be rewired? We are looking for a cheapish solution as we have just moved here and are hoping to have the kitchen redone so don't want to spend too much money in the meantime. It would be great to get a ball park figure of what we should be paying too.