I have received a couple of electronic responses as well. ASOS, a UK-based online clothing retailer, recently failed to send me a package within their estimated delivery window (after I paid a significant extra sum for Hawaii delivery), resulting in me having nothing to wear for a funeral. I sent them a letter and they sent me this response:
Outcome: Fuck that. I responded that I do not want a discount code because I have no desire to order from their company again until I can be assured that this issue will not happen again.