Very bad customer service

Placed an order for an upgrade on Wednesday and was told the device will take between 4 to 7 working days. I have spoken to numerous "agents" online who all advised me it is in the "delivery" stage but cannot tell me anything further. They then say I must phone the Sales team for more information.

6 calls (each over 21 minutes) later and still no one can give me an answer.

I would like to cancel my package (upgrade) if I am unable to receive the device this week as promised.