Data does not work in Romania

I have arrived in Romania, member of the EU, mobile data roaming should work and last year August it did work. We have 3 Smarty accounts in our family, none of them work. I am very disappointed. 

When Smarty claims it works in the EU, and it does not, is there any list published on the website that we can check if it should work and which local network should we use for roaming?

Thank you.