ACRYLIC NIGHTMARE!

so I went to the nail salon 3 weeks ago and i got a lovley set of blue acrylics, it's nearly time for back too school and as I have no money i decided to buy a bottle of acetone that says it dissolves acrylic nails. I followed the instructions and soaked for 25 minutes and it's only dissolved the gel nail varnish. I soaked again for an additional 10 minutes and the hard thick layer that they put on underneath won't budge Any tips on dissolving that and getting it off?