netmeg - 10:16 pm on Jul 14, 2013 (gmt 0)
You can't upload images here.
What you need to do is:
Go into your AdSense account
Select Allow and block Ads
Click on the Ads (Ad review Center)
Over on the upper right side, click on Filters
In the blue space, go to the similar to image line, and browse for that ad image.
Upload it and apply the filter.
It should then show you all the instances of that ad, and you can block them. BEFORE you leave the page, click the link on one of the blocked ads to find related ads, to make sure if there's one with slightly different wording or graphics, to block those too.
For extra measures, you can also block the URL of the ad - if you can find it.
Note - I've only done this for desktop ads, so I'm not 100% positive it works for mobile. Worth a shot though.
If it doesn't, if you earn enough to be eligible for AdSense support, mail your screen shot into them and ask if they will block it for you.