No one should promise a service, take money for it, and then decline to provide it. Apart from anything else, it's a sure way to make sure you don't get return clients.
But I'm a bit curious about the use of the word 'extras' in the heading to this post. Extras are often offered half-way through a standard service (like a massage). Just because a woman has offered FS or DATY as an extra in the past, doesn't mean she will today. So if you pay for the standard service expecting to be offered those as an extra (say because you read on this forum that they are available), I think it might be a slightly different story if it turns out only limited extras are offered to you: but again that should be made clear before the extra money changes hands.