ChangeHero only has a 5/10 rating on kycnot.me and their account on the forum,
ChangeHero.io, has negative trust after they were accused of scamming someone out of $21,000.
In that case, they did issue a refund, but it came many months after the swap was initiated.
Closing the case
According to the Terms of Use, on 31/01/2020 at 13:39:43 the Service has made a refund to the outgoing Address 0x975f422840ed3729a5b95a60e454e0826b719f4a, Hash: 0x207cc2a75781aecc9b08d6f7e7bfeadce53ff85c7ee509cc79ea8da1b8477d9f. The address will be blacklisted by the Service, and the User or any further operations connected with this address will be blocked.
There are several accusations similar to yours on Reddit. It almost seems like a pattern of selective scamming, where they wait for some really large swaps and then seize those funds and put up as many obstacles to avoid having to make a refund. It should not take very long for them to review your information. Considering their reputation, I expect them to drag this out for some time.