How to fix BEKO TLDA625 Larder Fridge Thermostat?

I have the BEKO larder fridge above which i think the thermostat has gone ,as nothing is cold inside and when i turn the thermostat control off and back on again i dont seem to hear anynoise of the fridge kicking in. is there a reset button anywhere on the back of the fridge to try first???or could it be something else