aw11 4agze power aus 86

i found my car door open after work and now nothing works

i'm quessing the is battery flat so i tried to jump start it with a mates car
i tired those gay start batt pack from servo butt nothing
push start don't work either
all i can get is the door light but when i turn key nothing

no fuses are blown everything is plugged in (crank sensor temp sensor ...)
i tried disconnecting the battery and reconnecting but nothing
ecu is still there
car was perfect this morning

any ideas would help