Disappointed in ARC Store

I was very disappointed as I could not do my payment as the payment site indicated that the suburb and postal code did not match-100% a first for me! I had to manipulated the site to push the payment through- ARC store was sluggish to get back to me. Today I received a notice that one of the items I order was cancelled as they received many orders and could not determine if they had stock! This was the one Black Friday purchase I really wanted. I am super disappointed in ARC store.