Overcharged by Harmony Group Woodlands for service

I've received an email from David Brown at Harmony Group Woodlands offering a partial refund, but I believe I'm entitled to a full refund given the circumstances. The smartwatch was clearly defective from the start.

ComplaintNest Administrator Intervention: Due to the serious nature of your complaint regarding Harmony Group Woodlands's tablet and the safety concerns you've raised, we have expedited this case in our system. We have directly contacted senior management at Harmony Group Woodlands and have received assurance that this matter will be investigated promptly. Additionally, we have notified the appropriate consumer protection authorities as this appears to be part of a pattern of similar complaints. Please stand by for updates as we work to ensure this situation is properly addressed. ComplaintNest Consumer Protection Team