Crown Publishing/Penguin Publisihing

I have entered the contests for Penguin for quite some time with no issues. No emails coming from them.
The last 2 days I have received over 150 emails. All in one email heading.
It is jamming up my computer and impossible to open just one to unsubscribe.

When I get this resolved I will no longer enter the contests from this place.

The emails come under the title Read It Forward. ERRRRRR

150????