This is their admission requirements
Admission Requirements - Level 100
West African Senior School Certificate Examination (WASSCE) & Senior Secondary School Certificate Examination (SSCE) Applicants
WASSCE and SSSCE applicants must have at least credit passes (i.e. grade A1-C6 and grade A-D respectively) in three core subjects including English Language, Mathematics and Integrated Science/Social Studies in addition to any three elective subjects with an aggregate score of 24 or better.
since you had 24 , you qualify to apply. The best place to get their forms is buy going to the school or better still you can call them on 0302-500722/500723 to ask them where you can buy some of their forms