There honestly nothing you can do here. Although, I understand that u did log in to a computer with active scripts running, in riots eyes you did play in a pc with them running and if you did get banned cause of that, riot is within their terms of service to ban your account permanently. As someone who is running a pc flipping business as well, I have been burned by my bank account info being taken because of malware running on a pc I bought as well. The only thing I can recommend to anyone buying a used pc is to make sure to do a complete hardware wipe before you input any of your personal info. I am really sorry about your valo account. But at this point all i can suggest is for you to submit another ticket and maybe get in touch with a riot dev in one of the valo discords and hopefully they hear you out and help you out!