Patek has made a point to encourage owners to return their watches for service or restoration. Reading on their website from the "Patek Philippe Commitment", Thierry Stern confirms their commitment for service and restoration requiring the same skills and craftsmanship which are used in creating a new watch.
I would think it may be prudent for you to remind them of their commitment, or duty as quoted, to uphold their high standards as they claim in their commitment to owners regarding service.
Hope it all turns out well going forward.