I have just received my child tax renewal forms and i've hit a snag filling them in and need help?

The situation is i'm a single parent my daughter is 17 and still in full time education. i was in receipt of JSA until 20th Oct 07 when i started a 3 year degree course. The problem is I cant get through to student loans company to find out which part of my student finance ie loans and grants are taxable to enable me to claim again. Can anyone shed some light as I cannot get through to the CAB either and another problem has also arisen I've had to defer/suspend my studies for a year as i'm going through treatment for cervical cancer so I have now had to put in a claim for incapacity benefit. Any advice would be gratefully appreciated