Make sure you change your home IP. If it's dynamic just unplug your router and check with google,

 

If it's static just call your ISP.

 

Since you've been doing this so long it could be true that they have detected your hardware (heard this is a thing, don't know much about it)

 

Also, uninstall runescape and delete all files involved with it and reinstall it.

it honestly really depends on the scripts, the age of the account, whether f2p or p2p, how many hours of the account is botted and how much of it is legit, the quest, sooo many factors that come into it that determines a ban. The only thing we can really do is just try our best to prevent the bans by using the resources given to us and know that bot detection often detects patterns and if many others have the same bot, its gonna pick up repetition and similarities between many accounts witch is a huuge red flag. Maybe invest in a private script?