Aisles grid locked!!!

Booked 4 seats from Edinburgh to Durham cross country train and due to the number of passengers (far too many for safety) we were jam packed in the Aisles unable to sit for the whole 2 1/2hr journey. Absolute disgrace. The passengers in our booked seats had also booked them.
This is totally unsafe, passengers were jam packed around the toilets and doorways too.
The conductor did put a message over the tannoy stating he would not be serving snacks or drinks etc, most likely he was stuck somewhere on the train. Therefore no one asked to see our tickets, you couldn't literally move (felt like we were on a 3rd world train!!)
Absolutely livid that this company had taken nearly £200 from us to travel in what we believe would be at least a seat!!!
Never again , please don't use this train service we certainly wont.
Surely staff should be counting tickets sold to the number of available seats to each carriage before boarding.