problems regarding data transfer

hey guys, I have a problem regarding the bandai namco id link(i live in Italy and play the global version) whenever I try to link my bandai Namco id, the loading always stops(this happens for EVERY linking way). any tips? i have downloaded the game in August but since then I haven't been able to do the login, it stops at around 1/5th of the loading bar. my Facebook and Twitter aren't connected, so idk what to do