How to troubleshoot

Last night my car alarm suddenly went off, I don’t know if I hit the panic button on my fob, anyway I switched it off. This morning my car wouldn’t start, instead the relays started clicking like crazy.

It only stopped when I disconnected the battery. I pulled out the relay in the engine compartment, still wont start. There’s at least another relay under the steering wheel that’s also clicking like crazy.

Current status: wont start. Breaking stops the relays from clicking. FOB has no reaction; the central lock whirrs, but doesn’t un/lock the doors.

Any suggestions or ideas to troubleshoot this issue? This is the first time this has happened.