Hi Sangram,
Below FM is used to get the subject profile. Check if you get an entry in this.
CALL FUNCTION 'CRM_ORDER_SERVICE_H_SELECT_CB'
EXPORTING
iv_process_type = lv_process_type
IMPORTING
es_service_h = ls_service_h
EXCEPTIONS
entry_not_found = 1
OTHERS = 2.
Subject profile will come in field 'ls_service_h-subject_profile'.
Thanks and Regards,
Ritu