After 1 hour, I announce to all the 'not my job' personnel who have ignored my repeated request for help (including walking to the courtesy desk and specifically asking for help) that I am cutting my own fabric, then i cut it.
Then I bring my cut up to the registers along with the bolt. The poor checker tells me I can't cut my own fabric. I tell him or her that apparently no one in the store can cut it, that I have asked many people, including courtesy desk and got no response, so I finally cut it myself. I explain that they are welcome to go back and measure it themselves. Lots of confusion and delay at the checkout, but eventually I get my fabric.
But I really have to want the fabric to do that. In fact, sometimes I don't even look if I can't SEE personnel working in the area.