Horrendous company to deal with they asked for NCB...

Horrendous company to deal with they asked for NCB proof which I sent them they said that they can t accept it as it was on a commercial policy although it was the same car! then they upped the premium including fees etc extra grand!!! So I say I m going elsewhere knowing I m still covered from my initial deposit low & behold they take more money from me unknowing to me!! Theft! I m in the middle of talks with my solicitors avoid this firm like the plague!