Account Hacked - Banned

My account got hacked like 6-7 months ago, I did not play sinse I study and work. Like 1 month ago I noticed and contacted Riot about it, and they helped recover the account, afterwards the last answer from them they told me that "I used script and my account was permanently suspended" obviously they should understand that it was the hacker using the script, how the %%%% could I prevent that? "It's your own faulth" "Its your responsibility" %%%%%%ed.
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