For a full A-Level you need to sit A Level Core Pure 1, A Level Core Pure 2 and then two of the A Level option papers (mechanics, decision etc). These are different to the AS Level Core Pure and option papers, as they contain additional content. The papers you have already sat I think will give you an AS Level (I think), but this doesn't count towards the A Level at all - they're a completely separate set of exams (with the same topic names)