Sent ETH to ETC!!!!

So as stupid as it sounds, I accidentally sent Ethereum from Stake.US to my ETC wallet on robinhood. I didn’t realize the mistake until 5 hours passed and it still didn’t deposit. I have the Transaction Hash and all the information about the transactions, but Robinhood support is saying the funds are just gone and I can never get them back. So I basically just lost $3000. And Stake.US is saying they have no solution either. Does anybody have a solution in any way possible to recover the funds? I would greatly appreciate it.