Generally network shops will only send phones away once a week or once every other week and often only get one delivery back each week. Depending on when you dropped it off and other factors like the weather it may still actually be sat there in the shop.
Unfortunately it's not an issue that can be dealt with through this forum. You should contact the EE store where you left it. If you want to contact Nokia you need to call the number on the link below:
http://www.nokia.com/gb-en/support/phone-us/
If they cannot help you then it's between you and the store where you left it.
Nokia themselves are usually quite quick for repairs based on my experience in the last few years but that was using their courier collection service or leaving at a care point.
