Zando poor service

I've ordered a product on Zando Website on 20 May. The delivery date was specified for delivery between Friday 29 May and Wednesday 3 June. Up to now I haven't received any service from them. I've sent an email to get an update on my order. The reply on the email was that the product was ordered from a third party supplier and the the relevant managing team will find out what the delay was. A few days later I received an email again stating that the problem was solved. But still I did not receive my product, or even an answer on what the delay was or when to expect delivery. On Zando website where I can track my order, it still only shows "waiting to be shipped". This message was shown from the day that I've ordered the product. I am very disappointed with the service from Zando.