Everyone, iM having problems with the.

Hi Everyone, Im having problems with the passengers side seat in my 2003 Suzuki Swift. After opening it to let out a back seat passenger, the back of the seat no longer locks in place, meaning it provides no support for the passengers back. It falls all the way back into the fully reclined position if sat in. The seat has a pull handel system to adjust the recline and also move it forward to provide access to the back seats. I would be very grateful for any advice. Thank you!