Delhi University — fees is not refunded

Sir i have cancelled my admission from hansraj college and paid the cancellation fee before 31st july. But the fees is not refunded yet. Please solve my problem as soon as possible. I have taken admission to ba economics honors. But due to some personal problems i cancelled my admission from hansraj college. I have tried many times to contact the college but helpline numbers provided on the website are not working. This is another problem. I hope that my problem will be solved.