My Emails disappeared

I am very active on hotmail and I login daily. But I realise that a lot of my emails have disappeared and some important ones are gone.  Although then I try to search for the email using the email address it is sent from , hotmail still has that auto filled in, there are no emails to be found. I believe that over 2000 emails or so we're gone. How do I get my lost emails back? I am sure that I did not delete them and saying so , I also tried the recovering deleted emails method but to no avail.