got a problem with my new fiesta rst.

pressed the heated rear windscreen button and i heard a fuse pop, and now battery light doesnt come on when ignition is on. (or when handbrake is up no handbrake light comes on the dash etc.)

its obviously affecting a whole circuit because the alternator is not charging the battery now either.

ive checked every relevant visable fuse and none of them are broken, are there any hidden fuses i may have not checked? it has an aftermarket toad alarm if this is of any relavence.

any help is seriously appreciated, as i cant drive the car untill i find this fuse!