fuse not fitting

[yidz1990]

hi i was hoping someone might be able to help me out. i bought a 1997 306 the other day and i was told that the central locking didnt work they said it might be the fuse but they didnt get round to sorting it and i have just been outside to have a look at the fuse and there wasnt a fuse in the slot for the central locking so i tried to put the correct amp fuse in there and it wont slot in. its just loose as if it isnt a live slot or something but it must be if its the central locking one im guessing. could anyone help me out with any suggestions?

Cheers.