Costco Wallet disappeared and I can’t access ~$345 in gift cards

Has anyone else had this issue with the Costco app?
I added two Costco gift cards to my Wallet, and shortly afterward the Wallet function completely disappeared from my account. I can no longer access or use the gift cards, with about $345 in total balance stuck in the Wallet.
I first reported this issue to Costco on August 31. I followed up again afterward, including on September 9, and have contacted them multiple times since then. As of September 25 — almost a month later — there is still no resolution.
The situation is especially frustrating because the $300 gift card was purchased recently. Since I cannot use it because of this Wallet issue, I have now reported that transaction to my credit card issuer.
There is also another gift card with approximately $45 remaining, purchased about 3–4 months ago. I haven’t reported that one to my bank yet because I’m still hoping Costco can resolve the issue directly.
I’ve been a Costco member for a long time, and this is honestly the first time I’ve been really disappointed with Costco. The Wallet feature is supposed to make gift cards more convenient and secure, but in my case, the Wallet disappearing has left me unable to access money that I already paid for.
I’ve given Costco nearly a month to resolve this and would really like to see the issue addressed. If I’m still unable to get a resolution, I may seek guidance from the appropriate consumer-protection resources and possibly contact local media to share my experience, particularly to understand whether other customers have encountered the same issue.
Has anyone else experienced the same Costco Wallet problem? If so, were you eventually able to recover your gift card balance?