Car Alarms: aftermarket alarm, 2002 toyota camry, toyota camry

Question
I have a 2002 toyota camry-i had my battery replaced and my alarm (that i didnt know i had) start going off..the horn was blowing and the lights blinking on and off. i was advised that there is an after market alarm on my car. my car will not start, i need to know how can i bypass this alarm? we tried pushing the little red button while turning the ignition..also tried locking car doors, then put the key in to deactivate it, but the car still will not start. PLEASE ASSIST ASAP!!

Answer
That's how it's done. If key in the drivers door, turn hard
left to disarm the oem system then hard right to unlock
and get in does not work, and valet does not either, your
next step is to see a car alarm pro to sort out the issue.

You have done what we have to do to do this. So it is a deeper
problem.

Have it checked.

ALARMTEK