Drivers door handle stuck

I can’t open the drivers side door on my 2008 5. It won’t move at all using either the outside or inside door handle or FOB. The mechanic I’m thinking of taking it to indicated that they may have to break the inside Door cover in order to get at the door handle And related parts to figure out what part(s) need replacing. Does anybody know of another way to get the door open when in such a situation? One day recently neither inside or outside door handle would move at all when trying to open door. Any suggestions on finding an inexpensive interior driver’s door cover should it be broken when taking it off while door is stuck closed?