This question doesn't make a lot of sense standing by itself.  As a general matter, a contract cannot be modified unilaterally (although some contracts give one party the right to make unilateral modifications).

It would be far better if, rather than starting your post from this point, you had started from the beginning -- e.g., "In [month] [year], I signed a contract with a massage/spa facility, the terms of which were as follows: _____.

What does "refund for accrued sessions" mean?  What does "refund for three months" mean?

Since you didn't tell us anything about what your contract says or what the "cancellation papers" say, we can neither confirm nor refute this.

I have no idea what you're getting at here.

Nothing in your post suggests any basis for legal action, so it is impossible to form an informed opinion about this.