After hosing the engine off, it will not start, alarm not working and the trunk will not open

Hello,

First you want to wait till the components are dry.
If you get water into any of the electrical components it can prevent the engine from starting.
Many times, if it just for water then when it dries it can work as usual.

So, when you turn the key is there power to the dash?
When do you try to start it what happens? Does it make any sound any clicking noise?

Have you tried to jump start it?

https://www.2carpros.com/articles/how-to-jump-start-car-battery-using-jumper-cables

Let me know a few more details of what you are experiencing and what you have tried so far.
Thank you.