Fridge Repair Job - Muldersdrift, GP, 1739

All of a sudden this evening my fridge is not as cold as it used to be, but the light is still on in the fridge. Is their some advice you can give me before i call you guys to fix it as im currently unemployed and if it is something as simple as wiping down something then i can do that because i only have a set amount of funds each month and things are really tough at the moment. Kindest regards
Danielle.