Vodafone India — I am not getting network on international roaming

Address:

844122

Hi
I have [protected] mobile no, i came in usa and i am trying to get network on my mobile, but i am not getting, then i call to vodafone customer care so many time but they are not able to resolve the issue or they are not willing to do. I have call nodal officer also they are always saying we are working on this on priority but actually they are not doing anything.