Electrical System/Component

I have a Volkswagen Passed 2.0 car and I've been having issues with it. Recurring issues. I've tried different mechanics and what I've spent on the car is too much. It keeps showing EPC light and when it comes on like this, the car loses power. It's gotten worse now and wouldn't move. I tried mechanics and rewires. Looking to get one more feedback

My Toyota Prado drove through the flood water two Saturday ago and the plugs were changed . It drove okay that day . It isn't starting again.

My Toyota Prado drove through the flood water two Saturday ago

Car ignition key won't turn to start at Sangotedo Ajah. Can you help?