well it has been over a week, which seems pretty extreme. I would expect you as the Dev to be in contact with them to help sort out any issues they may be having, as the process doesn't take a week to accomplish..
Is very unfortunately happened not the way it was planned. Definitely need some time to straight out everything. And it's readily upto the exchange to update their wallet. Just keep contracting them and file support tickets should speed up the process.
Edit. The amount of time and effort. There is no way he wants do anything to damge his project.
I got one 4.99 reward from POS and now POS back to .499 on the last two rewards.