Anti-theft system

Okay, so basically I accidentally hit the lock button while I was in the car and simply hit the unlock button and opened the door to get out. However now the alarm won’t stop sounding whenever I open a door or turn the car on(the car will start but the alarm stays sounding). I’ve disconnected the battery with no luck. We had the ignition switch replaced so the key we have only works in the ignition and not on the car doors. Can I cut off the alarm some how or do I need to get a whole new key that will unlock the doors to cut off the alarm?