I need refund from an undelivered order

I rate Onedayonly a zero. My order number is ***, their website updated that my item is delivered 6 days ago, I've been doing follow-ups with them with no luck. I receive automatic email responses that I cannot followup on. In one email I was told that the courier company should provide me with tracking details. What courier company are they referring to? At the moment I want my money and have them deal with their third party. I am doing business with onedayonly, they are responsible for dealing with the third party, not me. As a consumer I am blinded from their supplier nor the courier company, how is it that now when I am following up I'm referred to these. I've purchased quite a lot from the organisation, but this was my last. I'd like my refund and I'll stay far from them.