Disappointing service

I received my Amanda May dress and much to my dismay, found a stain and make up along the front of the dress. I emailed Zando and the lady asked me to send pics which I then forwarded on. The response back was that the dress will be fetched and first assessed by the team and then I maybe will get a replacement. I was horrified. I just sent proof that the dress was not checked before being dispatched to me which was in my email back to the lady. The lady then told me that a replacement one will be sent to me when the courier picked up the stained dress on a Friday. On Thursday the courier turns up at my house unannounced to pick up the stained dress, no replacement. By Friday afternoon, still no replacement, I then phoned zando, spoke to the lady I emailed only to be told that there is no size available!!! I have never experienced such service from zando before. The dress I purchased was on special and now nobody can help. Shocking.