Poor customer service

I had the most unpleasant experience at Woolworths Cavendish Square when I was returning an item bought online. I was asked to show the debit card that I had used before I could get back my refund as if that was not discriminating enough I had to send them on email the tax invoice and the supervisor kept me waiting because the email was not reflecting and mind you the cashier is the one to put the email address. I find this was just so unacceptable and I am very disappointed with the level of service that I recieved at your store? tax invoice number: ***