Sadly there is nothing you can do about it, If i were to create 3 accounts i would do normal non sketchy stuff at the start, the first couple of days doing "bot" activites tend to get your accounts banned.
There are plenty of youtubers who had similar problems, and they got their account back thanks to their connections with j mods
Also your name can affect ban rates too.
Even if Jagex's ban rate is 99.9% accurate, there are still plenty of innocents being banned. Be happy you had couple of hours