This company take people on at very low wages usually employing people that are in a bad financial situation and remove them if they don't get on with the team and or ask for any more money (I have witnessed this for 12 people with in my time there). In my case I had 1 year there before I put forward a strong case for why I thought I should have more money (as I was seriously under paid for my roll)and they told me that I could leave my job now or they'd find a reason to sack me.
A year later after they tried to make my life as uncomfortable as possible at work and saw that I wasn't going to leave, they made my position redundant even though it is an essential position. The work was then spread out over many people over the company so as to get away with not having that role.
I am in the process of taking them to court, along with 3 other people (that I am aware of), for constructive dismissal.