Region error

are you getting error 8016something or are you getting the not available in your region error

if you are getting the out of region error your physical region and account region must match

if you are getting the stated error 8016 then you need to press x on purchase screen to get past it

A regional lockout (or region coding) is a class of digital rights management preventing the use of a certain product or service, such as multimedia or a hardware device, outside of a certain region or territory. A regional lockout may be enforced through
physical means, through technological means such as detecting the user's IP address or using an identifying code, or through unintentional means introduced by devices only supporting certain regional technologies (such as video formats, i.e. NTSC and PAL).

A regional lockout may be enforced for several reasons, such as to stagger the release of a certain product, to hinder grey market imports by enforcing price discrimination, or to prevent users from accessing certain content in their territory because of
legal reasons (either due to censorship laws, or because a distributor does not have the rights to certain intellectual property outside of their specified region)

Regional lockouts in video games have been achieved by several methods, such as hardware/software authentication, slot pin-out change, differences in cartridge cases, IP blocking and online software patching. Most console video games have region encoding.

The main regions are:

Japan and Asia (NTSC-J) This is where Hong Kong is located

North America and South America (NTSC-U)

Europe, New Zealand and Australia (PAL region)

China (NTSC-C)

The original Xbox as well as the Xbox 360 were region-locked, although it was up to the publisher if a game is region-free or not. A number of games are region-free and will play on a unit from any region. Digital content through Xbox Live are also region-locked,
such as DLC, movies, and apps.

Bottom line you need to get games according to your xbox 360 console region

Here is a list to help you in purchasing games:

https://www.play-asia.com/info/xbox360_compatibility_guide

Actually 80153 errors tend to be region lock errors or billing issues

the simple solution does your account region reflect your actual region?

If not that would be why it has to match

Region migration only works on future region locked purchases

Points cards won't work, but Live cards should. The only problem is, if you've never entered your address, it may ask for that information when you first try to redeem a card. If the address doesn't match your region then it won't let you continue.

Your account region and your actual region has to match in order to download the pack.