Such Bad service!

On thursday 23 July, i ordered an upgrade via their online store, On the page it stated that someone will contact me shortly, the next day i phoned them again and made my upgrade via the telephone. The lady on the line said that i will receive my upgrade on monday. Monday i phoned them and they said that the phone has not received the courier yet and it will by tuesday , i gave my reference number and they said i will be able to track my upgrade via the courier and online, i have not been able to. I phoned them again this morning and they said that they have been experiencing technical difficulties, without contacting me and the phone will only been dispatched within 24 hours, whilst their website says free next day delivery???