Merrill Edge hasn’t credited cash-in-lieu after ETF reverse split (over a month later). What can I do?

I’m running into a frustrating issue with Merrill Edge and wondering if anyone has advice. On May 5th, the GOVZ ETF underwent a 4:1 reverse split. At the time, I held 2.07 shares in my Roth IRA. Based on the split, that should have been reduced to 0.51 shares. As this would have left me with less than 1 share, I expected to receive cash in lieu for the fractional amount. However, over a month later, I have not received any cash in lieu and I did not receive the fractional shares either. I’ve cal