Someone just sent me a #, 833-452-0096, where you can reach an agent who helps with people who didn't receive their card. In his case the OTDA had sent it to a wrong address they had on file, and in a different case they had put it on the guys SNAP card and he didn't realize- they were able to look it up and point it out to him.
I didn't test the number yet myself so I'm not speaking from experience.