I had a Dutchmen TT for 18 yrs. If you've tried running it off level for only a week like you said just leave it on gas and take it out for a tow right away. A 30 min plus shake up could settle it out. I don't think you've damaged it but they aren't that great to begin and yours is no spring chicken.
Get the model # of the fridge and do a search about adjusting the temp. There are a couple of different types and some aftermarket thermostats floating around. When checking the temp don't peek every hour. Maybe get one of those outdoor thermometers and put the sensor in the fridge.