not receiving international text messages

I have unlocked iphone5 from Apple store. My network is T-mobile. I stopped receiving international text messages and noone is able to help. I did restore as new phone, restore from backup...called t-mobile 5-6 times. Nothing.... I can send messages with no issues. I had 4 people send messages to me (intermational) and nothing... Same people test my friends on other networks and works ok...Anyone had same issue or have anything to advice?