Hi Kelly,
Thank you for your feedback - I am really sorry to hear that your replacement stickers have not arrived with you yet.
I have checked your tracking information and can see that this was shipped with FedEx on the 29th April. It seems that your order has been delayed over the weekend due to the national Bank Holiday here in the UK. This meant that courier services were not operating yesterday.
Your order should update on the tracking information within 24 hours - I will keep a close eye on this too and if this does not happen, will open a case with FedEx to find out what is causing this delay.
I do apologise for this and hope you do enjoy your stickers once they arrive!