I would stop trying to convey how bad it is and start saying what you want them to do.

Same here.

Same shape here, different drug. The thing that helped was documenting the refusal rather than re-arguing it. They refer rather than write.

Same here.

Reference ranges differ between labs, so comparing two reports is close to meaningless.

Read the methods section. It is the only part that says whether the conclusion is allowed to exist.

Split orders. Two small parcels beat one large one for reasons that have nothing to do with price.