Before you do anything, you should really be reevaluating your approach and why you are doing what you are doing. Going to some dead end uni, getting 60k of debt without a game plan seems like a recipe for disaster.
Take a step back and figure out what you are doing wrong because you clearly aren't able to study effectively. At A-levels, most of the answers are already available to you, along with literature. Simply going through books, the specification, past papers is enough to get at least a B for most Science and Maths based subjects.