Motorola Razr 5G -2023 (Screen blacked out)

I bought a Razr 5G from T-Mobile in August 2023, and by the following month, I was already dissatisfied with it. The phone is significantly slower than my previous iPhone 12. I initially bought it for its sleek design and foldable technology, but soon after using it, I noticed that the touch functionality wasn't working properly near the foldable area.

I continued to use the device carefully, but last week the main screen went completely black, rendering it unusable. Now, I'm forced to rely on the small secondary screen, but it's not a practical long-term solution.

I contacted T-Mobile for help, but they have been unhelpful, especially considering I've been a loyal customer for over a decade. Since it's been more than a year since I purchased the phone, they informed me that the warranty is no longer valid. I didn't opt for the expensive insurance ($180/year), and now they're unable to assist me.

Does anyone have any suggestions on how I should proceed?