An integrated course is not designed to teach you what you should have learnt at school. I would say using UK standards a minimum of 5 GCSE(O) & 2 As.
They expect you to have an acceptable level of education before day one of the course.
You need to undertake aptitude testing to ensure that you have the basics. Go back to night school for 6 months and show the necessary commitment.
Otherwise it is a waste of their time, and more importantly a waste of your money. These courses are expensive and the penalty clauses in the contract for failing to pass the many progress tests are not in your favour. Quite an imbalance taking into account their overall loss of profit.
What is your present occupation ?