Vodafone India — number porting

I stay in kolkata. Want to port my aircel number to vodafone. But the vodfone outlet in girish park kolkata are not helping me and all the time they are making new stories first they were saying my porting number is incorrect and tried to sell me a postpaid connection when i said i dont want it they said they cannot help me. After few days they are saying my request for port has been generated and i will receive the sim in one week.
Now they are again saying that my porting number is incorrect.
They are haressing me from last one month.