Change your Microsoft Store region
You currently have a subscription from a different region. If it still doesn't work, please contact customer support.
If I try to go to the Brazil store to do it, they want a billing address in Brazil, which I don't have.
I checked with XBOX support, and the rep I chatted with said that the offer only works for up to 36 months, and since I have 36 months now I need to wait a month before converting from XBL to GPU. That seems unlikely to me. Anyone else encountered this, or have any other suggestions?