ESA to UC Migration gone wrong

Hi I have been in the assessment period for managed migration from irESA Support Group to UC.

My assessment period has just ended and I found out that I have been switched to New Style ESA and UC instead of a straight migration.

The letter about New Style ESA also says I will have to go for an interview to talk about how my health conditions affect my ability to work.

I'm assuming from the B&W guides and forum that this is an automation mistake, but please could someone confirm to me that this is not a legitimate change under transitional protections, and direct me to what I need to say/do to get it fixed?

I've been paid a ESA payment after my old provision had finished (and it's a different amount) so I assume this is the New Style ESA.

I did add this on to my original thread about my claim for continuity but moderators haven't posted it so I thought maybe it's simpler to start a new topic if it's maybe been stopped because of the size of the thread?

Thanks to anyone who can offer me any direction - I have a letter from DWP about NS ESA and a statement on my UC account about that payment being minus ESA because I am still claiming. I don't know where to start really, and find phone calls deeply stressful.