Delayed delivery from The Elite Institute

I've received an email from Karen Harris at The Elite Institute offering a partial refund, but I believe I'm entitled to a full refund given the circumstances. The dress shirt was clearly defective from the start.

Dear valued customer, Thank you for bringing this matter to our attention. We at The Elite Institute take all customer concerns seriously and are committed to ensuring your satisfaction. We have reviewed your complaint regarding our t-shirt and have initiated an internal investigation (Reference: REF-73A863F2). One of our specialists from our Customer Success will be contacting you within the next 13 business days to discuss this matter further and work towards a resolution that addresses your concerns. We appreciate your patience and look forward to resolving this matter to your satisfaction. Sincerely, Karen Garcia Account Manager The Elite Institute Customer Relations