Universal Credit migration

kimkat

I was originally a long time ago on Incapacity Benefit, I then got moved over to Esa support group, at the time my ESA was both IR and CB, I am also a carer for my daughter, I could not at the time get Carers Allowance but got the Carers Premium, because of a overlapping benefit and this has been in place since 2010, in 2017 my claim was rebuilt, and named IR ESA, however apparently "in law" i am still receiving both. Not sure what this means, I have contacted DWP about this, as I am trying to do a calculation of my entitlement of what I would get on UC, the calculator always asks if you get CB ESA, if you put yes, it asks for the amount, which neither DWP or Carers Allowance can answer, it's not showing on their system, i asked about doing a calculation, just got told to wait for a migration letter,how do you get a true calculation, any help truly appreciated.