you are not bound to pay entire course fees
2) college cannot refuse to grant TC because full course fees not paid .
3) college is bound to return your original certificates
4) complain to university regarding college refusal to return original certificates and furnish TC
5) you can lodge police complaint against college under section 406 of IPC for refusal to return original certificates
6) you can also move consumer forum against college for its refusal to return original documents and seek orders to return Original certificates and pay compensation