Dr Pepper complaint: Bad Batch

My complaint:

I bought a 36 pack of Diet Dr. Pepper from our local Sam’s Club. I am not sure if it was a bad batch, but it is not good at all. I bought 2 fridge packs today, and cracked a can, it tastes so very good. Just wanted to make you aware that it wasn’t flat, but it tastes old, and almost chemically. The numbers on the bottom of one of the cans is C2 081QT3 08:00. Numbers by the UPC is DP-0105 DPAC.00318G. Hope this helps.

Suggested solution:

I don't know how you handle these, therefore I am not going to tell you how to handle your business. I wanted to make you aware. Thank you for your time.