I sent ethereum from coinbase to myetherwallet.  I doesn't show up there.  In fact, the wallet itself doesn't show up there.  However, I used my correct wallet address, as given in the beginning.  Coinbase shows that it sent it to the correct address, and etherscan shows that that wallet exists, and what is in it, but I can't see it in myetherwallet.  When I signed up for metamask I did it with my current address.  Somehow, a new wallet has been generated that I never was given the code for, but there's nothing in it.

I contacted myetherwallet but have received no response.

Any ideas?