Nursing is VERY competitive. It is not enough to just meet the grade/subject requirements.
All Unis will 'score' every application - GCSE profile, A levels etc and your Personal Statement.
They will look to see what practical experience you have of any sort of caring role, what relevant work experience you have, how you have described what you learnt from this, and they will look for your understanding of what the job involves, and your maturity, evidence of leadership etc etc. They then 'rank' your application score against everyone else's, and presumably your application score was not high enough to be offered an interview.
Thousands of people apply for Nursing. Most won't get an interview.
If you are still determined to do this, then you need to plan what you are going to do next year to increase your chances. You need to get the best possible grades you can, then organise relevant paid work for next year - anything that involves front-line care like working in an Aged Care Home, Special School, Hospice etc. Then reapply next year.