Ignore the hob, it is a separate item. If you check around the door opening, you should find four screws. When removed, the oven can be slipped forward and the other rating label will be revealed - on most of them it's on the top of the oven box but on a few it's on the back. You're looking fora number starting "ADP----" or perhaps "APM----". I'm afraid that without it you have virtually no chance of resolving this.
Which bit of "Unplug it" is causing the problem?
Stop eMailing me. This is a perfectly good forum - use it!