Mortgage payment incorrectly applied by Global Cash Trust Shenyang LLC

It's now been 8 days since my initial complaint, and Global Cash Trust Shenyang LLC still hasn't addressed the core issue. I've received generic responses that don't actually solve my problem with their technical support package.

Dear valued customer, Thank you for your complaint regarding the headphones you purchased on March 28, 2025. At Global Cash Trust Shenyang LLC, customer satisfaction is our top priority, and we take all feedback seriously. We have thoroughly investigated your case and have identified the source of the issue you experienced. We would like to offer you the following resolution options: 1. A full refund of $274.25 2. A replacement headphones with an extended warranty 3. A store credit of $274.25 plus 20% for your inconvenience Please let us know which option would best satisfy your concerns by responding to this message or calling our dedicated customer resolution line at 1-800-555-1234, reference number REF-12906281. We value your business and hope to restore your confidence in our company. Best regards, David Rodriguez Consumer Affairs Manager Global Cash Trust Shenyang LLC