After reading your post I'd like to give you my opinion. First, I think tube/force feeding is very, very stressful for him/her and although I may not have all of the facts here, I would certainly only resort to those methods as a last resort. If the animal is WC it could very well be doing what most do once in captivity...fasting or refusing food - but unless excessive weight (I'd say 10% or better) has been lost I would not worry too much. You say he/she has a low activity level, that also falls into the category of stress. Please let us know your set-up, your temps, your substrate, etc...that will help us help you. Taking for granted the animal is set up properly, and all is well with his surroundings, I'd say get an accurate weight, leave him alone (no holding, etc...) no bright heat-lamps, just fresh water at all times, a hide or two, an acceptable thermal gradient, and belly heat (UTH) He/she needs to be left alone, it sounds like he is stressed out bigtime with all of the attention and assisted feedings. I really think 3-6 months of being left to acclimate in optimum conditions with little to no disruptions he should turn around. Sometimes a complete change of scenery helps as well, start fresh maybe with new surroundings...after he adjusts try various prey items - there's all sorts of "tricks or techniques" that have proven successful, and we can all cross that bridge when it comes. If I am assuming you haven't tried or are already aware of some of the above, I'm sorry, I just think that's the way to go right now. Tube feedings, etc are only making matters worse I would think in this case, but that is only my opinion. Please let me know if there's anything I can do to help, and GOOD LUCK!!