There's a surprising amount of therapists who might be excellent at helping with bereavement, anorexia, depression and phobias but who suddenly turn rubbish when a fat person arrives and says "I can't control my eating". Obesity is one of our undefeated bigotries - it's still socially acceptable to mock the fatties and suggest maybe they don't eat so many pies. And therapists are only human, just like the rest of us
I'd suggest trying a different therapist. I'd also double the reccommendation for Lee Janogly's books - I particularly liked Only Fat People Skip Breakfast. Extremely edifying.
Slimming World is very
attractive to binge eaters, but that doesn't necessarily make it the
best solution. Binge eating is an emotional disorder, and Slimming World's "solution" is to promise you as many "free" foods as you like. You can eat carrots and Muller Lite yoghurts until they come out of your ears, but this doesn't help you resolve your emotional eating, and it doesn't help reduce the size of your stomach.
Rather than searching for a diet which works, you need to get to the root of why you binge eat. Start keeping a diary. Every time you go for the snackies, write down what you ate and what you were feeling before, during, and after doing so. Also note what you were doing before the binge. See if you can spot any emerging patterns linking emotional state to the urge to binge.
Is getting upset about something sending you to the fridge? Is it because you're up late at night and feeling bored or tired? Is it because you spoke to someone who upset you? Is it because a film made you cry? (Don't laugh, I've buried myself in a burger to hide the tears after a trip to the cinema, believe me

). Try to identify what triggered the feelings which are sending you reaching for the foods.
If a therapist who doesn't understand you cannot help you, use a therapist who
does understand you:
Yourself.
You can put a stop to it. You really, really can. You just need to approach it as a problem which needs to be solved. Gather data. Investigate. Evaluate trends. And once you've identified triggers, remove them from your life.
Is it being up late that does it? Go to bed early. Is it watching weepies? Don't watch them. Is it someone saying something mean? Stop speaking to that person. There are as many possible solutions as there are potential triggers.
Stop buying calorific things. You eat them because they are to hand. If you don't have chocolate, cakes, crisps, or whatever other treats are tempting you in the house, you can't go to them and eat them. If they
are in the house, your brain natters away at you. "The cake's in the fridge. It'll go stale if you don't eat it. The cake's in the fridge. In the fridge, there is a cake. CAKE. IN. FRIDGE. EAT! CAKE! CAKE CAKE CAKE!"
Finally, if you want an early helping hand, write "How will you feel tomorrow?" on every cupboard or fridge door that stands between you and the edibles.