Poor work done on my car !!

I took my car to Renew IT in 2020 for repairs , i was referred by my insurance. The repairs was for my bumper to be replaced as it was damaged, Renew IT told me that have replaced the bumper. I had issues with them since then as their work on my car was not done well , i went there several times complaining about their work . Later on , now in 2024 , my bumper is now lose , i never bumped anything, however my bumper is st***********. Can i please get my car fixed properly. I can’t be still experiencing issues years later if the work was done well on my car. I thought my bumper was replaced with a new one , only to find out it was just repaired, and not properly even .