If in a certain code language, '+' represents '$\times$ ', '$-$ ' represents '$+$ ', '$\times$ ' represents '$÷$ ' and '$÷$ ' represents '$-$ ' then find the value of the following expression.
$$8÷4\times 2-9+3$$

Substitute the operators according to the given code:
* $÷\to -$
* $\times \to ÷$
* $-\to +$
* $+\to \times$

The original expression is:

$$8÷4\times 2-9+3$$

Substituting the coded mathematical operations:

$$8-4÷2+9\times 3$$

Applying BODMAS rule (Division $\to$ Multiplication $\to$ Addition $\to$ Subtraction):

1. Division: $4÷2=2$

$$\text{Expression becomes: }8-2+9\times 3$$

2. Multiplication: $9\times 3=27$

$$\text{Expression becomes: }8-2+27$$

3. Addition & Subtraction:

$$8-2+27=6+27=33$$