Riot's support is not going to be able to solve your problem. I don't believe they even communicate with the developers. At least that's what the support staff told me when I asked them. See this response:
Thank you for the suggestion! We can't pass feedback reports directly to the development team, but Riot Games has established a set of forums for our players to be able to submit feedback. The team is always looking at the forums for interesting ideas, as well as getting a feel for what parts of the interface players think could be improved.
Here is the response I received in response to my complaints about the wretchedness of LeaverBuster:
Greetings player,
I understand you have some concerns about our LeaverBuster system. A player will receive a one time notification after they leaver/afk a game, regardless of the reason why. Our LeaverBuster system does not make a distinction between intentional leaves/afks or ones due to factors outside the player’s control. This notification was simply just a warning message that continued leaves/afks could result in being placed in the low priority queue. It does not mean that any action was taken on your account.
We understand that players may have some leaves/afks that are beyond their control and our LeaverBuster system is designed to only penalize frequent leavers/afkers. As long as you are playing, and completing all your games in the future you have nothing to worry about.
Let me know if you have any further concerns and I will be happy to assist you.
I urge you however to keep two things in mind. 1) Riot is a fairly new company and 2) They make video games. This has the probable result that they really don't have all the business logic worked out yet. Whether they are fixing it or not remains to be seen (my guess is probably not since their focus has shifted towards the LCS). However even if they want to fix these issues it may require they restructure how they as a company work and they may not be at the point where that is deemed a significant business risk. Basically, give it a bit.