I had one like that, also from a relative :-)
I called her & told her that there was a problem before I started. She said just do your best. I pressed it again, using lots of steam. Then I SITD around all the blocks to stabilize them. Some were flat, others had puckers. Used cotton batting so after it was washed it was less noticeable.
I'd call her (or him) and let them know before you start that there's an issue.