scams from other country

i has received letter from girl from africa they say in their letter that they has alot of money in a bank like 5.3 or 3.5 million, they father pass, so they need to leave their country for it is bad. they are staying with a pastor of a church, they also give me a phone number and a name to reach. i like to help to stop this. one of them i did chat with but i was very careful because i dont trust that country.