How could my income change?

At the moment, I'm on ESA (Support Group) and the benefits I receive are summed up as EESA on my bank statements, which I think stands for Enhanced ESA. It totals £243.30 per fortnight, but I wasn't expecting any increase compared with the roughly £203.40 per fortnight I used to get on Income Support with Disability Premium.

According to the benefit levels listed for April 2014, I would be getting much less, but I've heard that I won't be, so I can't help wondering what I actually will get if I stay on ESA (Support Group), or if I was somehow transferred onto another benefit.

I think that one possible alternative would be that I was transferred onto ESA (WRAG), which I narrowly avoided, so I wonder how much less I would get then. I've also heard about PIP, but I don't know if or when I might go onto it, but it may be useful to find out.

Great! I needed this information because I need to deal with a nasty company I owe money to and I'm trying to make a deal with them about how much I must pay off the debt and how often. Their demands could completely abolish my social life. They demand that I fill in a form declaring all my income. I will now tell them I get £200.30 ESA per fortnight instead of £243.30 ESA per fortnight. This amount is roughly the difference between one "big night out" per fortnight and no big nights out any more. I can supplement this with some cheaper nights out. According to this company and others like them, I'm probably not entitled to have a social life at all, but should just think myself lucky I'm still alive.