Disputing apartment debt with Experian

I disputed two apartments with Experian. I'm hoping that they miss the 30-day window to respond to my certified letter. As the 30 days have nearly expired, I have questions on how to proceed.

1. The last time I disputed, Experian printed my credit report on Day 30, and mailed it (postmarked) on Day 32. Both days fell on a Tuesday and Thursday, respectively. There was never a letter, they simply put a comment within the entry saying that it "meets requirement on FCRA". What recourse do I have with this timeframe and their method of responding?

2. If one credit bureau removes something, are the others legally obligated to remove it also? How do I go about this?

3. On day 31, what do I do when I haven't heard from them? As you can see, my goal is for the quickest deletion possible since the reporting is incorrect.