stuck fermentation

Hi all, I'm currently brewing a amber saison, the recipe is as follows. Mind, this is just a basic recipe with not much Amber liquid extract 1.7kg Pale liquid extract 1.7kg Cane sugar 1kg dextrose 1kg 500g wheat extrct Crystal malt 300g brown sugar 200g 50 g cascade hops (boiled) 25 g of...