American fridge freezer, fridge not cold!

[ICanSeeForMiles]

Please can someone tell me how to fix this problem? I've Googled but to no avail, and this is my last ditch attempt without shelling out $$$ that I can ill afford on another one.
We recently moved house but it's not cooled down properly since (and I suspect it wasn't at optimum temp before either, but not as warm as this)
It's a Whirlpool, out of warranty obv, and I've put a fridge thermometer in and it's 11 degrees at the top and 9 at the bottom.

[TobleroneBoo]

After moving a fridge you are supposed to let it settle for a few hours before turning it on, so if you didn't that might be why? No advice but it may help to resolve if you know the cause

[ICanSeeForMiles]

It was left for 24 hours for the gas to settle before being turned on again I'm going to have to buy a new one aren't I

[PigletJohn]

does it have a temperature control knob, or buttons?

On mine, "max" means colder and "min" means warmer.

I complained to the makers, who said it is a coldness scale, so it means "maximum coldness" not "maximum temp"