Incidentally, you mentioned you sent DMCA takedowns, but Chupamobile seems to offer submissions to it's own copyright notice address too on the T&C,

> "If you think your products has been copied or there was some breach of copyright please inform us by sending an email at report@chupamobile com, including:"...

So it might be worth hitting that also. I'd also like to make clear that I completely sympathise with your situation, if my other responses had implied otherwise.