You have options
3,000 follower real active turks (they can unfollow) (10€)
10,000 follower mixed (20€) (you can buy this only 5 times)
also if you want ı can give your tweets 1k rertweet and 1k favorite every time you buy 10,000 (that means only 5 tweets and yes it's free )
and dont trust people who say "those followers will interact" if followers are real people he/she can't know that.