Apply Apple card balance to AppleCare?

How do I use my Apple Gift Card balance to make AppleCare payments?

Despite my attempts to do so, I’ve been forced to accept an “Apple Gift Card” instead of having the value of a Mac Mini Pro M2 applied to the purchase of a Studio.

I’ve dealt with ≈ 5 different Apple advisors about applying the Card to the purchase of this device. Having lost that round, I then turned trying to have my AppleCar payments drawn from that balance. Again 3 different agents testified to this without giving details other than go to App Store.

Well, NO. No matter how I search nor how many attempts at the App store nor how many wiggles and jiggles I’ve done, it’s NO JOY. I did find a ‘help’ page (https://support.apple.com/en-us/118245) that noted that I could use the balance to pay for my iCloud bill. However, that statement gave no instructions nor links to do so.

Okay, I’m approaching anger here. Apple should not treat its long term customers this way.

So once again. How do I make my AppleCare payments draw from the Card balance? Based on what little I've found in my searches, it may be that Apple will not allow something so simple as apply the balance to the AppleCare bill. (Really Apple)

Oh and for those of you who shrug and say, "Well, just buy something." In the last month, I've laid out ≈$6,500 for my current set. Buy an iPhone case? Seriously?