is my Hotpoint Fridge Freezer (ffa91) worth getting Fixed?

my Hotpoint Fridge freezer ffa91 alarm is sounding and lcd is flashing at 21c and why the fridge and freezer is not working.?bought my hotpoint ffa91 ..it pretty much leaked water from day one..and the bottom of the freezer was constantly freezing..making extremely loud popping noises .then 18mths later the lcd warning blue light on the centre of the top of the fridge freezer started displaying a thermometer and 21c ..subsequently the fridge and the freezer has warmed up..there is still power going through it and i can still hear the motor running.. and the odd gurgling noise.. so was wondering..could it simply need a new thermostat.? or possibly does the gas bottle need refilling.?. is it worth my while getting fixed ?