I have shares in two accounts, and they both look like they have essentially disappeared for the time being. I don't have much experience with this, but it makes sense that there's a bit of a timeout during the transition. For example, any standing orders would obviously need to be cleared out, so you're not buying or selling at a totally wrong level.
Please, please, management team... reduce the reverse split to something like 50 to 1. Put good news on the wires and save the share price, for all our sakes, including yours.