S.H.
1) everything has to be dried out. There are professional flood damage people that have these industrial sized fans/dehumidifiers etc.
2) before you waterproof things... it has to be dry. Not just externally, but WITHIN the structure... too. Or you will just be sealing up, moisture and wetness underneath.
3) you need to get a professional assessment of your structural, water damage.
4) underground water seepage.... and thus water damage... is hard. If the subsurface of the ground is still wet... then water damage can still via capillary movement, wet your structure etc.
And yes, with extensive water damage.... you may have to tear things out. And probably, WILL have to.
You can't save, what is already water damaged.
Then, mold growth is another problem of this.
I can cost, quite a bit.
Find another company. Or they are all quite busy, trouble shooting everyone else's homes.
If your drywall is damaged, then the subsurface of the walls are too... and the sub-flooring.
Water, can seep through tile floors. Unless the flooring was lined with waterproofing, already, before the tile was laid.
It is smelling, because water damage is where you cannot see it.
Between the walls and flooring.