Failure to replace windshield agreed @purchase

IC Nissan car dealership sold me my Juke with a scratched and chipped windscreen and promised to replace it on demand because it was supposed to be new, and was paid for in cash. Now they are new employees and management trying to find a loophole in the document I signed 2.5 years ago.<br> <br> Now I need a new windscreen, and they say that I signed that it said \repair"and not replace"