Slow inept service

Place order for 2 items on the 3rd Jan , I was then informed othat the one item was not available in the colour I chose and I accepted the alternative. On the 13th Jan I finally received a delivery and only one item was delivered. No explanation from either the transporter or Tendayonly(this is their new nickname as they always take ages to deliver. I contracted tendayonly yesterday and received an answer today blaming the transporter and stating that they decided to split the delivery and stating that it "should" be delivered today.