all recent contacts missing after migrating to yahoo

Hello,

I migrated to yahoo mail and all was well.  I then had trouble sending text message from my iphone to my new email (I was using ...@comcast.net.  I read somwhere to delete the comcsat email account from my phone which I did..... I was then able to get my email messages.  However, since I did that, my contacts on my phone have been replaced with some old contact list.  I cannot find my most recent contacts anywhere... not in the icloud and can no longer just access my old email account on comcast (to try to download a csv file)... I tried doing it from yahoo and it is just this old list.... How can I recover my most recent contacts and get rid of this old list?  Thank you.