Please tell us you are not going to drive the car without your seat belt.
I do not need an annoying beep to order me to put my seat belt on. Of course i normally put the seat belt on but there are occasions - car parks, toll gates etc, when you need to remove the seat belt to pay. Then you have to switch the engine off,take off the seat beat, pay, put the seat belt back on, then switch the engine on. ...
I assume you don't know where the fuse is - i do not welcome any advice other than as to the whereabouts of the fuse.