Apologies in advance for a very specific question, but has anyone done PGS on frozen blastocysts at CRGH?

We had an appointment to discuss this last week after my first cycle failed. We were given a price at the time and decided to go ahead. They have now come back and quoted double what they did last week! They seem to think there was a mix up but the lady last week seemed certain - she even printed the costs for us.

Is anyone able to help please? Thank you.