Bnet app refuses to log in

I have been trying to log in for the past 2 days now and have tried everything i can find and cannot fix the issue …
All of my details are correct and it says the error is Blizzards end …
I have never had an issue with my account in almost 15 years so it is becoming very frustrating now that I want to play …
For some reason it will take me to a “complete your account” page but even if i try too , it will not let me get past the name part as it won’t let me type anything in and will not let me to the next page as my name does not have enough characters…
I try to change it in my account settings and it takes me right back to the same page again …
Error - BLZBNTBNA00000A8E

Any help greatly appreciated as there is no good reason as to why i cannot log into my bnet app …

Many thanks