Manager

Hi - I am currently travelling (Colombia) on a postpaid corporate plan but am unable to activate my roaming (tried connecting to Telefonica and Claro - the data roam networks operators suggested by Starhub, but to no avail). I have followed all the steps, including SMSing the numbers given on the Starhub website and I have tried calling the helpline but am not able to get through (to no surprise really as roaming is not working!). Could it have something to do with my APN settings? 

Also, the issue is quite urgent as I cannot access any banking services because I don't receive my OTPs via SMS...

Can you please help?

THANKS!