A certain program transmitted data to the tax office, after 1 year, according to their data, our sole proprietorships did not overrun the limit, but in fact got out a million beyond when all the documents were already in the tax office, the company refuses, and does not want to do anything, what is the solution to this issue?

I lost my certificate for the 11th grade, I lost it 5 years ago, the school in which I received it is no longer there, what should I do?