I got banned for using a third party software, yet I never had one.

Today I had gotten a perma ban on my account saying that I have been using third party software, yet the only thing that comes close to it is an app called blitz that helps with builds, counters and items. All happening before game. The only thing new with Blitz is the in game overlay that helps show you your cs compared to different ranks. I'm both confused and mad because I have been playing for a long time and have paid a lot of money for different champs and skins. I have placed a ticket but I'm still confused cause Blitz has been said to be safe. Just recently as well I have looked into Blitz only to find that a Riot employee had said that this app doesn't go against TOS.
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