I'm confused as to how a high-rise flat (with only one occupier), with a fairly low rent, can have such a high (discounted) council tax bill.
I'm on JSA (which pays the same as ESA), living in a Band A property, with the 25% single occupancy reduction. Like you, Nailit, I was receiving full CTB but I now have to pay a reduced Council Tax bill. However my bill is only for £37.66.
Perhaps you should
(a) check that you're getting the 25% single occupancy reduction ; and
(b) ask your council to check their figures.
Chris