Keys not working after replacing seat belt handover

[Herbmiester 909]

Like many E92s my seat belt handover did not work so I ordered a replacement. To fit it I waited until it extended then removed the fuse that manages the seat belts, marked with person in a seat and a slash across them like a belt. This stopped the handover from retracting. I then removed the old part and replaced it with the new part. However when I reinstalled the fuse the remote and Comfort Acces functions on both keys stopped working. The fuse is not blown as the handovers work fine. I am really unsure where to even start here. BTW I did replace the battery on one remote even though it was working perfectly before I removed the fuse, just in case. Can anyone give me some direction here.

[kwhelan 231]

if youve checked all the surrounding fuses for accidental damage have you tried disconnecting battery for 15 mins, seems to fix a few gremlins