What should I do if I cannot accept any of the hypotheses in a replicated experiment? Before I start explaining my situation, I would like to say that I have read the other questions on this topic but I cannot find what I need on 100%. I am a bachelor student and I am working on my bachelor thesis. The main activity of this thesis is to make a replicated experiment. The experiment involves participants to ask questions which require statistical and accounting intuitions. 

After I have performed the experiment, I cannot get on 100% the same results. I know where the problem is coming from but it is too late to re-do the experiment. I am not sure what I should do. How bad is that for my work, as I cannot accept any of the hypothesis compared to the original article?

I have made an extension but I cannot accept the hypothesis of this extension as there are no statistical reasons to do so. I am capable of arguing about why the hypotheses failed to be accepted but I am sure if it is nice to fail at your hypotheses. 

I have never written an academic paper before. 

Regard Boris
Honestly report about the results you have achieved, including any errors and omissions in the method that have occurred, or any reasons why you think the results are not as expected. 

If you produce a good analysis and report, then it won't matter so much that the results were not as expected. 

The point of a bachelor thesis is mainly to demonstrate that the student is capable of applying the skills learned over the prior years in a larger setting. The goal is not to produce original publishable results.