i am unable to give you an authentic answer, but will try to help you

1. Qatar Airways has got a toll free number in INDIA,
I forgot the same. They can clear this

2. I dont think you need to call QA office in Doha.
Your travel agent should help you this. He can fax
the visa copy to QA-Doha office, mentioning your
PNR number, name , and telephone number