During the renovation project our builders fitted the floating floors and they did not levelled the surface properly. So the floors near the sliding doors to the garden are bouncing. They tried to put filler underneath and fixed it with a threshold but the floors are now wavy and look awful. We asked them to rectify the job. So now they are going to hack the uneven area with a saw, lift it and try to level the surface with either more underlay or levelling compound and then put it back. I am afraid it might only make the things worse. I wonder if I have to ask them to refit the floors completely including levelling the surface properly (it is combination of cement and old parquet) will I have to buy new floors again as the boards were T&G glued (I think with PVA or something)?