Printvilla.in — have not received my back cover

On 14th april i placed the order of a back cover in printvilla.in the item has still not been delivered.
We agreed at the point that i placed the order that it would arrive within 7days.
Under the consumer rights act you are required to deliver the item to me at the agreed time. As i have still not received it and it has past the agreed time, i believe you’re in breach of contract.

If you do not deliver the [item] by [date], i will be entitled to consider our contract at an end and will expect you to refund me the full purchase price of [£xx].