Bad service/ rude customer service urgent/return my money

I purchased my order online at Edgars online.i chose correct sizes but just after I paid.i saw thier system changed the sizes.i ordered size 12 trench coat and size 6 boots.but thier system changed coat to size 8 and boots size 3.as soon as I noticed that I called online shopping customer care.i spoke to a rude customer urgent who told me it's not thier fault I chose wrong sizes she will call me back on Monday .never called.i called again Monday spoke to someone who said will speak to delivery department call me back still nothing.Today I'm receiving an email that incorrect order will be shifted.im so disappointed I'm never ordering at Edgars anymore.please cancel my order and refund me.