Trai — international roaming does not work

I have done recharge for international roaming in my jio network but there is no network coverage, i tried getting help from jio customer service but they are unable to help me out it's seems like jio don't have a international roaming in every country and they misguide customer by mentioning on thier website, i have made recharge of around 1020 but i couldn't use it.in india their network is pathetic in abroad they just don't have, sometime quality matters then the quantity.