ᐅ Incorrectly Installed Floor Screed in the Bathroom – What to Do?

Good evening dear forum members,

I need your advice regarding some decisions we have to make.

We are currently having an end-terrace house built through a developer, and the screed was laid nearly two weeks ago. Before signing the purchase contract, we had to accept an additional cost of about €2500 (approximately $2700) for a walk-in shower, as this was already planned and agreed upon with the relevant companies. This special feature is therefore included in the purchase contract and is legally binding.

However, last week the site manager called me to say that the company that installed the screed made a mistake and did not take the special request for a walk-in shower into account. Now it is too late to realize a walk-in shower without complications. We were asked to choose from three options:
1) No special shower features, meaning the standard option (a half-round shower tray)
2) Shower with a raised platform
3) Walk-in shower, but the ceiling will be opened, covered with a soffit, and decorated with recessed lights. This lowered soffit would be attached to the living room ceiling.

We have categorically ruled out option 3, as we do not want a soffit with lighting.

With option 2, we will not receive a refund for the extra cost because it was argued that the raised platform shower involves the same work and costs as a walk-in shower. As a small apology, they would install a shower door for us.

Overall, it is simply frustrating that we have to accept compromises now.
What is your view? How can one proceed in such a situation?
I appreciate any advice.