Laminate worktop joints and plinths

Hi Everyone,

Any advice would be appreciated!

I have recently had a kitchen installed and I am currently in talks with the installation company as the finish of the kitchen is not great.

I need some advice regarding the laminate worktop joints. The builder used colour fill in the seams/joints, but after only a few weeks, in which I have barely used the kitchen, it is already cracking/ coming out. I have not used any harsh cemicals to clean the worktops. And I never put anything hot...

Laminate worktop joints and plinths