How to find ????

hi friends, Well A big problem have comes here. Plz anyone suggest me what to do??? Actually i had applied for working visa through recruitment company in my country in August. But due to delay by them, after a month i cancelled my process and tried another means go get visa. And start for another process.

And before few days I was informed by my friends who is trying to issue my visa, "that my visa have already been issued before"Said my representative of Immigration office. I was shocked since with recruitment agent i had already cancelled more over they hadn't proceed my document that time also for visa.
I dont know what to do? While asking with agent they says they havent got my visa and even not done any process. And I cant get visa for Qatar untill my visa expire or cancel that visa which i am really unknown how it comes and who is the sponsor.

Can any one suggest me that what process I could do to find out who is my sponsor?, When It being issued?, Who issued it? and What i have to do to know all these things? So that I can process for getting visa again soon.Plz Help me with some information.