I did what was suggested and called back window installers to seal it with silicone (they left exterior sealed and water leaked). They told me it's not their job to seal the window only make it but they offered to do it. They did a bad job, they applied silicone like putty, instead of straight line and made a mess. They did not use the caulk backer foam that i bought for the gaps (maybe not important). Pictured is part of it below window frame, there is concrete sill, the black rubber is to keep window elevated in the center (something like that).
What's the remedy, there are open gaps in the silicone. I feel in a matter of months the sealant will break apart and allow water ?