Member response:
I know a few models who will scam you at any chance you give them, many advertise that they do even [i.e. FinDom]. They try, I say no, some models I have even spoken to directly that I won't spend on them in particular ways because I don't trust them. This type of model is amazing to enjoy if you know how to play their game and to not get too caught up in it.
From a member perspective, models who scam are actually giving their consent for members to freeload off them guilt free. A guilt free perve is never a bad thing, we need some wicked models on site.
To answer the OP's question, consumer law applies, but would anyone really bother with lawyers over a few tokens, especially when the first place a lawyer would send you is here if you are serious about a refund?
US consumers:
www.ftccomplaintassistant.gov , just fill in your online form.
It is most likely just intimidation and a display of frustration at being ripped off. In future this member will just be more careful on future spending, he'll take fewer risks, make the rich and popular models richer. They thank you for sending another customer their way.
BBW_420 if you did something wrong by a customer, you can tell MFC a refund of those tokens is appropriate, should the customer ask for that. This would be enough of a response to place legal responsibility back on the cam site, and the responsibility for claiming that refund on the customer. You may receive a warning from the site over your behaviour, but this is a fair trade off for maintaining your security should this be pursued further.
Another option is to use the 'Financial Domination' defense, he wasn't expecting anything in return even if you promised it.
Lastly, don't put up with any threats, use ban and ignore if you feel you need to; he'll feel entitled to take some value back after being ripped off.
Private based cam sites (not MFC) used to refund regularly upon customer complaints, but as gifting, and other types of sales interactions have become more common the practice has been wound back. Consumers need to be highly cautious on their spending with cam models, if you have a spend you are unhappy with, refunds are unlikely as the provider (cam site) cannot verify exactly what type of transaction actually took place.
I am sure every model, and almost every member has had a bad interaction at some stage. Usually they are more disappointing than anything else (tech. difficulties, crashes, performance issues etc.). Personally when things go wrong, the best action is to show some class about it rather than turn to tantrums.