Power-Up Workbook: 1st Edition

I have enough sense to know not to order a book unless it is listed in good condition or better. Which, this one was listed as acceptable and I took a chance because one would assume acceptable means (because it’s a workbook) that it may have a few tears, folded pages, and the occasional writing, but in general it’s fine. Acceptable. Useable. But the book I received is basically worthless. The first half of the book has been written in (several math problems on every page) with a multitude of completed equations and roughly 18 worksheet pages are missing. Acceptable?? This isn’t even fair condition. It’s poor. Very poor. I’m so disappointed.