This is fake consultancy and only money maker. They are having half knowledge of process and doesn't help you. Even you can do better than their support.
Better if you are looking for this consultancy, go to the respective embassy website and you will have full knowledge.
They ask for huge amount and they don't do anything special. At the end of day, you will realize that you are doing all the things and they did not anything. TRUST me guys, don't waste your precious money in giving them especially.