Front door issue

I bought a new entrance door from Vrebos Overijse in 2025 January.

Since then, they have come to fix an insulation issue 10 (!) times, but the problem remains unresolved. At the top of the door, the seal still does not properly reach the frame.

They have now closed my file, stating that they cannot do anything more. They told me that if I still believe there is a problem, I should hire an independent professional to inspect the door and provide a report.

My question is: which company or professional should I contact in the Overijse area to inspect the door and issue an expert opinion? The door is still under warranty.