I hope the participants in this discussion from 2018 don't me picking up the thread, as I have a similar problem after making the mistake of sending OCTb, an ERC-20 token, to
Freewallet before it was supported, back in August 2019.
I'm still waiting on a solution, after many emails and tweets; so in case anyone else makes the same mistake I've laid out the
discussion with Freewallet on my blogAny suggestions how best to encourage Freewallet to escalate this to a solution in June 2020?

Hi stuartgh,
We are sorry to hear that you had such experience with Freewallet.
At the moment, we still don’t support OCTb tokens.
The full list of currently supported tokens can be found here:
http://bit.ly/2BzxJKQ.
We understand that it's very important for you, and we are doing everything to find the resolution as soon as possible.
Our specialists will contact you as soon as there are any updates for you.