We cannot adjust your rank, but we do not need to! The system will take care of it very quickly on its own.
If you feel like your rank is way off from what it should be, all you need to do is play a few ranked games (preferably live, to make it quick) and it will quickly settle. If you really are in a hurry challenge a stronger player if you want your rank to grow quickly or a slightly weaker player to adjust in the opposite direction (use custom game to create a rank restricted challenge).If your rank reads “?” instead of a number you just have not played enough games for our system to be able to rank you with any confidence. The solution is the same. Just play some ranked games (usually about 5 are needed).
But do not obsess too much about it! This is a problem that will solve itself.
Quote from: FAQ - Frequently Asked Questions