I need to speak with a Premiere Pro technical support representative by phone to resolve an issue. How can I get someone on the phone?

I’m working on a Premiere Pro project that uses old Merged Clips. I created subtitle-burned versions of several lab-roll files that are frame-for-frame identical to the original media, including the same duration and timecode. I need to replace the original lab-roll media with the subtitle-burned versions while preserving all existing Merged Clip and sequence references. Premiere’s Replace Footage function does not seem to work correctly with these Merged Clips. I need technical assistance figuring out the correct way to relink/replace this media without breaking the existing sequences.