OP sent BTC to USDT (Omni layer).

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@OP, there is nothing you can do but wait, no matter how long it is. It either they will successfully recover your account or not. Technically, it seems easy to recover the fund, but if you see it from an exchanges' perspective, it needs a length of a chain of command and proper steps by step operation to safely recover your fund without compromising their whole security in results from the process of recovering your funds.

Since you only can wait, I stand with what @OcTradism stated on that topic. You might want to try to make them keep updated with your ticket by somehow bumping your ticket whether it is weekly, bi-weekly, or monthly.