Britishnational lottery
Prize money

I recd mails continously regarding british national lottery winning money mentioning the same ref no and for each reply from me they give further actions and now the status is the delivery status. they ask me to choose one courier company from the given list which charges 550pounds to get my winning package. and they also mention that i have to pay that courier charges and get my parcel. i want to know that whether i trust it or not. please reply me immediately because they give me only 7 days time to get y parcel