Buildings Insurance Value If An Insurance Company Lets You Down......?

If an insurance company lets you down......? - buildings insurance value

If you had a good policy) at home (buildings and contents, which suffered severe flooding, and their insurance completely disappointed that compensation due?

My house was gone by the floods hit last year, from day 1 things go wrong with the statement:

They have never been away from our house while it dries (4-6 weeks running computers 24 / 7).
They have never provided accommodation B & B
Our new for old, paid only about 50% of lost sales.
We had to sleep in an empty house without heating, furniture, etc., a bag (with clothes, television, microwave, 2 sleeping bags and fly 2 beds) for six weeks after all of our property from storage.
The first order for the reconstruction was approximately £ 40,000, insurance, but covered only less than £ 8,000, so that we cover the rest.
It took more than 5 months before anything was said, and even less, and runs 11 months before returning home (still unfinished).

Amount of compensation?