How can I convert an Oracle dump file into SQL Server?
"is there any possibility to use another way in converting oracle dump file?"

Import the dump file into Oracle. Transfer the data from Oracle to SQL Server using any number of tools (flat files, SSIS, linked servers, replication)

Forget about processing a dump file. The only thing that can process a dump file is Oracle. Or you can spend a year reverse engineering it then have to start over again when the format changes. If you want to convert Oracle data to SQL, you aren't going to be able to use a dump file unless you import into Oracle first.