Misleading express delivery promise

Cotton On should be honest regarding their delivery schedules - ordered something and paid for express delivery (one working day after dispatch, which should be tomorrow as the garment seems to have been dispatched today). Towards the end of the day after the order was placed and paid for, I received a message indicating that I could expect Dawn Wing to deliver the garment two days later than expected (Monday, instead of this Friday). At no point during the order and payment process was a particular ETA mentioned. If I had known that the ETA was 4/10, I would've made alternative arrangements as the said date took me past the date when the dress was due to be worn. To add insult to injury, Superbalist.com has the same outfit available for the same price (and overnight delivery at a fraction of the cost, with the ETA (1/10 - not 4/10) specified no less). I ordered a dress from Cotton On and shoes from Superbalist at the same time. The shoes were delivered this morning. The former? No idea where it might be languishing if Superbalist manages to have stock for next day delivery. Refund requested. Adopting **********, blame-shifting attitudes towards the customer is inexcusable. P.S: It takes a person who spent 8 years in customer service, with experience in biting her tongue, to ever write something like this. If I find it ridiculous, it likely is, and the company's Facebook rating bears me out.