Well, you can always call for service from some place like Crown Appliance in Center Harbor (
http://www.crownappliance.net/).
If it were me, I'd first suspect the igniter. A quick search on "replace caloric gas range igniter" turns up a lot of links, including this one from Sears:
http://www.sears.com/caloric-gas-ran...-SPM6616930903
If you have the documentation that came with the range, it may well have a diagram of the internals, with a parts list. You may be able to figure out how to get at the igniter to inspect it for a crack that would indicate failure. Hopefully someone will post here how to locate the igniter. You probably could find out that info online. This sort of thing happens all the time all over the place, and replacement of a failed igniter easily falls into the DIY category. This link is the sort of thing you'll find easily:
http://www.applianceaid.com/gas-igniter-replacement.php
Look at several such explanations, perhaps even a video to see if it's the sort of thing you want to tackle. Of course, if the igniter seems intact, with no visible crack indicating failure, the problem could be in the sensor that detects a hot igniter; that detection has to occur to signal the gas valve that it's ok to open. But even that part would be available online.