My order was automatically canceled HSN

My order was canceled tonight by HSN of $135 I call customer service they said I have to call the flex Department to find out why I have been ordering from HSN for quite a while and pay them on time I was told by the customer service that within 72 hours refund and a reversal back to my card I will be contacting my bank tomorrow and if so file a complaint with the government who regulates business. Will not be ordering from them ever in my lifetime again