leaverbuster

So I've been in low priority queue more this season than any other, I don't understand why. well I do... I keep getting disconnected from games at least once a day and I don't know how to fix it. I've done what people told me to do like getting the hextech repair tool and that hasn't helped, I've also uninstalled and reinstalled and still happens. I don't know what to do. I've sent slips into support but they just tell me to use the repair tool and it'll be fixed. so I'm stumped.