EA is deleting Key-Store-Keys
There are many complains in the official EA forums, that EA deletes keys, that are bought in so called “key-stores”.
These stores don’t ship installation media or offer them for download. They just sell the game keys.
The affected users had shopped at gamecodestore.de, hexakeys.de, gamekeyland.com and eBay.
Accordingly, the keys come from an unknown source, which is classified as a scam. It is recommended to contact the relevant shop and ask for a refund.
Source: EA Forum