Item paid for but not delivered & repeated Delivery Dates which mean nothing

Absolutely appalling service all round. Delivery was supposed to be this past Saturday. SMS that one item to be delivered later Saturday. Nothing. I mailed Monday & was told delivery rescheduled for today, Thursday, nothing again. Maybe they think that the recent annoying mails received each time a customer now logs on will distract the customer from not receiving the long outstanding items, which have long since been paid for. Totally disgusted.