Possible Issue with UK Level 8 Diplomas

[FireMedic_Philosopher]

So, as some of you know my eventual goal is to earn an RA doctorate so that I can leave EMS and the fire service behind and go into academia or the government full time. I already have a MS and a grad cert and BJ helpfully suggested I complete a UK Level 8 diploma in leadership to try and "ladder" into a doctorate.
I wanted to post here to say that the idea while good in theory is not panning out. Thus far, I have contacted several schools and want to share the results. 1) Valdosta. Contacted regarding the DPA and asked about transfer credit. Valdosta will not commit to accepting it for any credit whatsoever as they consider it a "completed" program. They only accept for credit any doctorate level classes that have not led to a finished degree/diploma/certificate.
2) LSU online. Contacted regarding the EdD in Leadership with an emergency management focus. They will only count the entire level 8 diploma for a single class.
3) Middle Georgia, will not accept it for credit as it is a "completed" program.
4) Waiting to hear back from SIU in Illinois.
5) Waiting to hear from American College of Education in Indiana.
My point is, most schools claim they will not give transfer credit as it is a  "completed credential". Further, no one will give me ABD standing. While it seemed like a good idea,I have had no success in getting a positive reply. Now I admit that I am not contacting Liberty, Walden, Columbia Southern, or some of the others. With academia as my goal, they do not seem like ideal schools.
Has anyone here ACTUALLY done a Level 8 from the UK and gotten into a US doctorate program?