Advice required: business acquaintance cannot see they're in trouble

This is bothering me and I don't know what, if anything, I should do and I would appreciate some advice.
I have a business acquaintance who I see regularly - let's call them H. H is a sole trader, registered for VAT, not a ltd co. H has an accountant who also deals with H's website. H has told me that they have had 2 VAT investigations in the last 24 months and an HMRC investigation. VAT man recently told H not to purchase any more stock. H is still purchasing stock. H is struggling financially - stealing from relatives and going to foodbanks. There are self-confessed mental health issues. H is a vulnerable adult. I believe H is being exploited by bigger companies, their suppliers (and accountant). I have expressed my concern to the one big company we have in common (we have to pay them pop up shop rental - H struggles to do this with on-the-day takings) but they tell me they have to deal with them as any other business.
Is there anything I can do to help? Is there an organisation I could put H in touch with? Or do I just watch them go bankrupt and (genuinely) suicidal - there have already been attempts.
H is not my friend and not my rival but I am concerned for their welfare.