Suspended for 4 weeks?

I got suspended from someone protesting I tanked my iRating to win rookie level races. I Never tanked my rating purposefully. My rating was usually around 300 and then I got it up to 600 the highest it has been and I am C class. I got into a M2 race and won it got kinda exited. Now just got suspension email. Is this normal? If you can help my Iracing name is Michael Webb4 you can see irating trend.