It's more complicated than a retirement extension . Quite a few more docs required and a home visit . You also have to draw them a Map to your accommodation .
*****
0 Baht seasoned for 2 months in a Thai Bank account with full access to the money .
Just leave with all your stuff , then e mail them telling them you have left because of the noise and disruption . You will lose the 3 months money you paid up front .
Nothing else will happen , they are just trying to scare you into paying up the rest of your years contract .