LiRaW, I do understand your anger and frustration but posting multiple threads about this topic is not welcome. As such, this thread is now closed.
As the respondents above have mentioned, it is unscrupulous players, who have created fake websites to mimic the official RuneScape website and, sadly, as part of watching their stream, where they advertised said site, you have entered your details. This means that your account is compromised, because another player knows your sensitive log in information.
If you have not already done so, I recommend that you check out the Support Centre. Pages that may be of assistance are: