Lancet "loosing" patient samples

I want to know how is it possible for Lancet to 'lose' my sample? First set of test came back and Lancet advised that it goes for further tests. 2 weeks later NO feedback after my doctor phoned and they said they can't find my sample? For someone waiting for test results then finding out that I will have to go through the whole process again is not fair, not even to think about all the fees that will have to be paid again.

I give you 48 hours to respond with a solution or I will take this further