How to implement a descrete state space of a switched system with disturbance?

Hey, I have a five switched system each described as follows Ax+Bu+f(x). such that f(x) is a nonlinear term in function of the state of the system. one of these five systems works when it is triguered according to some conditions. Since I have five systems both of the matrices A and B changes according to the system chosen. so my question is which block in simulink should I choose Because i used matlab function but it didn't seem to work with the discret system but it worked pretty much fine for the continuous system? Thanks in advance

[Aquatris]

You might have implemented the discrete time system wrong. I would check the continous to discrete time transformation, and check if your A and B matrices for discrete time are correct.