Not saying you haven’t been but I would try to be as clear as possible, if you can have screen shots with different time stamps. If I am understanding what has been discussed that after you do the three 50 DB refreshes then 4 hours later you would have zero offers left since they will have all expired and no new ones would have taken their place until you have the ability to refresh them again.
If this is the case I would try to have screen shots that catalog the issue, one starting at right after the last DB refresh since it will show the count down for the next available DB refresh and I would screen shot all of the offers after taking any of the trades that came up, then I would take screen shots every 30-60 minutes as the trades expired but no new trades were added (the DB refresh counter will act as a time stamp). Once all trades have expired I would continue to take screen shots showing the timer continually counting down but no new trades being offered.
If you still do not get any movement on your issue after that I would suggest tagging @Ned here on the forums to see if any additional help can be offered.
Also let me know if I have explained incorrectly what your issue is.