This is what I’m hoping but like few have said , needs someone who knows what they are doing so would I want their electrician to reinstall them???? Problem I have is having no experience with this I wouldn’t know if it’s been done correctly until this sort of situation happens
You are not alone .....
Lights like this really need to be installed with sufficient spare cable so the unit can be pulled out OR have an accessible waterproof box in close proximity which has sufficient cable in it so the unit can be pulled out.
So get the installer back and ask him to demonstrate how to do this and see what happens