Rear Seat Belt problems of the 1996 Hyundai Accent

Three of inside door handles did not work. Driver's side door previously broke . But has been repaired by the dealer under warranty. However, door broke again. Also, back driver's side door and front passenger's side door handles broke/back passenger side door could not be opened from either inside or outside, and front passenger's and driver's side doors could only be opened from the inside. Consumer is also having problems with the back passengers' seatbelts.