Your question is too broad to answer- except to say it needs a visit to a gunsmith that can examine your rifle, and see what parts are broken, worn, or loose.
Without knowing the model, and having some idea of what is wrong or broken on YOUR rifle, the only answer is TAKE IT TO A GUNSMITH. Good questions equal good answers.
Take it to a gun smith.
Proofhouse.com has a store brand chart. Any competent gunsmith should be able to repair it or point you in the right direction
To operate a Western Auto Revelation rifle, first ensure it is unloaded by checking the chamber and magazine. To load, open the action, insert cartridges into the magazine, and close the action securely. Aim at your target, and when ready to fire, engage the safety if it is not already disengaged. Pull the trigger to fire, and repeat the process as needed, remembering to always follow safety protocols.
Mossberg
Marlin
No
I have a Revelation 2500D and it is very clearly a Savage manufactured rifle. Identical to Savages of same period except for the rollmark.
Up to 100 USD
100-300 USD
Mossberg
Ask a gunsmith for help