Mass Nutrition Sent the wrong item and would not credit back or replace with the original order. Internet

I ordered from these guys a few months ago and was told that they didn't have the flavor protein I wanted and had ordered online. Instead of the banana casein I wanted they told me they only had chocolate fudge and that was all they could offer at the time. I approved the change to the order.

I called back about 20-30 minutes later and said I didn't want the chocolate and that I would wait for the banana. At this point I was told that "the order" had already been sent to the shipping dept and there was nothing I could do to change the order. That's ridiculous. I received the order and like I expected, hated the chocolate fudge casein protein.  On top of that, it took over two weeks for my package to get here... in Jacksonville, Fl. These guys are out of Miami. That means they had more than enough time to correct the order since they obviously didn't ship it out that day or even the day after. I have contacted them again and was suprised at just how horrible their customer service is.