Raggie, what did you cook in it that stuck? the first few things you should cook in it are things like bacon, steak, burgers, foods with fats/oils
the factory "preseasoning" is just a starting point, don't expect to cook eggs or veggies and the like and have them not stick to the pan, build up the seasoning layer first, eggs are a tough one, my CI cookware is *almost* up to doing an egg with no additional oil, but i've been cooking burgers, bacon and the like on it almost exclusively, and grilled/seared veggies come out brilliantly well
keep in mind that you also don't need to use as high a heat as you do on other cooking surfaces, use low to mid temps, i have yet to take my CI cookware above setting 5 on my cooktop, cooking on lower heat/slower also makes food taste better, high heat increases the chances of sticking
the first egg i cooked on my skillet basically molecularly bonded to the pan, but i figured the seasoning layer wasn't built up enough yet, so I scraped off as much as i could, let the pan cool and removed the residue, didn't hurt the seasoning a bit
it just takes time, don't give up yet, it's definitely worth it, the taste difference is amazing