Hello Ca7ALySt.Volt, welcome to the forums.
Would you be able to try the following fixes for me for purchasing Steam Siege Credits? -
If you are using any VPN software, please make sure to disable your VPN when making trying to make the purchase.
For some people it seems to be a regional issue, could you also temporarily switch your data centre to your native data centre if possible before making the purchase?
At the moment our current server locations for Siege are -
- east us, central us, southcentral us, west us, brazil south
- north europe, west europe
- south africa north
- east asia, south east asia, japan west
- australia east, australia south east
This article explains how you can switch your data centre, here -
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