Recurring encountered rude staff with Standard Fabrication Group package

I've received an email from John Martin at Standard Fabrication Group offering a partial refund, but I believe I'm entitled to a full refund given the circumstances. The smartphone was clearly defective from the start.

Dear valued customer, Thank you for your complaint regarding the smartphone you purchased on April 24, 2025. At Standard Fabrication Group, 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 $274.53 2. A replacement smartphone with an extended warranty 3. A store credit of $274.53 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-7DC8B441. We value your business and hope to restore your confidence in our company. Best regards, Charles Anderson Customer Success Manager Standard Fabrication Group