You should be able to pull the knobs next to driver & passenger seat to release the boot hatch.
If it doesn't disengage properly, you might need someone to stand at the back, lifting lightly as you pull the hatch-release.
Please post your car model & year number (presume it's a 'Euro' model as you're in Amsterdam).
It's just the car needs to come back to life. It's asking you to invest some time in what is going to be a very good relationship
