1. Even if your body marks are old, you can visit your nearest Govt. Hospital to get yourself treated and get a prescription/certificate from the said hospital stating that those are the marks of injury caused by hitting by blows or an object. Actually you should have taken the said certificate immediately after its occurrence.
2. After collecting the said medical prescription/certificate, you can lodge a police complaint u/s498A either visiting te police station or by sending the complaint by speed post to the police station under copy to the local S.P./D.C. and collecting the postal track record thereafter.
3. You can claim refund of dowry you have paid to him alleging that you have paid in cash. You can not claim the amount paid by you voluntarily on your marriage from him.