@Obsydian: I'm sorry to hear that you've had trouble getting through to our Shop Team. From what I can gather then team aren't currently able to receive/respond to emails, therefore if you would like an update on the progress of your order then please ring them on 0330 726 7467 quoting your order reference, and an advisor will be able to look into this for you. Alternatively if the order was placed before the 6th May then please follow the link below and complete the relevant fields to track the order online. I hope this helps.
I am in exactly the same position, I did manage to speak to somebody at Samsung, having got the number through the chat feature. However, there were not able to help nor provide anything other than what is available through the order search. £150 voucher offer for Google Play expires in 10 days.