I can't upgrade GOLD to ULTIMATE

Since you upgraded to Ultimate, your gold was cancelled and upgraded to Ultimate as well. Cancelling Ultimate also cancels your gold.

Well no as you forfeited the when you canceled

The gamepass ultimate upgraded your gold to ultimate which wouldve been 13 months of ultimate

Not 1monthn of ultimate you were told this when you upgraded

As with any subscription it stacks unlike psn it gets exchanged 1/1

And since you canceled a prepaid gold.ultimate membership there is no refunds

Prepaid cards can't be refunded and the gold was canceled and upgraded to 13monthd of ultimate when you upgraded

When you bought the upgrade it would've told you the new renewal date

This was also.mentioned when you canceled

Hi there,

since you already had Ultimate before then if you decide to upgrade to Ultimate and you currently have 12m Gold, then the 12m Gold will be converted (via a specific ratio) to Ultimate, I think it's 12m Gold convert into 4m of Ultimate, more details can be
found in the FAQ here:
https://www.xbox.com/live/gold/upgrade

Fyi just going to mention that 1/1 upgrade from gold to ultimate no longer exists

As of the recent price increase the conversion is 3/2 permanently regardless of if gold or ultimate (no need ro upgrade not just add the gold time to ultimate or upgrade to ultimate but 1/1 is no more)

No it will just expire

Now you are doing it wrong

Thats is he expensive way to do it

Buy 12 month gold codes for total of 3 years of gold

Add it to your free account when upgrade ro ultimate for a free upgrade to ultimate for 3 years

Keep in mind your ultimate can't be active while you enter the gold codes or they won't do 1/1

It will do 3/2