Can't update Xbox Live region code

I have a UK Microsoft Account and I've used it in the past to change my XBOX gamer tag last July. When I am trying to change it now, the gamertag change page is American and wants a new Credit card which I can't enter because it won't give me UK 'states'
to choose from. When I try to change my region, it gives me an error.

I have recently got a new Windows 10 PC and have signed into the Microsoft and XBOX accounts on this and wonder whether this is the problem.

Can someone please help? I can't change my XBOX gamertag.

Thanks

:)

 

Error Code 80150101

Tried the cache thing and re-installing updates. I can't download a single thing from xbox live.

Physical Region: Australia

Account Region: Australia

Content: Everything

Error Code: 80150101

 

XLiveGold prepaid.code

two things first prepaid membership codes are region specificspecific so you can't use out of region codes

2nd Romania isn't an xbox live region

 

I've used a different computer and it has let me change it because XBOX thinks I'm in the UK when I use that computer! Can anyone explain this?

 

I've discovered that it's Google Chrome that, for some reason thinks I'm in the US. If I use Microsoft Edge, it works fine. Hmmm

 

if you are using Google dns then you must use your isps dns sevver

Or you will continue to have problems with region looked content t