Finally received both the email and SMS.
I thought I was very lucky to clear all pages of the signing up process till I got to the "Secure Payment" part which required me to authenticate.
I was forced to enter the email address and password of the account for so many times that I decided to give up for the day...
Don't give up. I had the same issue. Wrote to their customer service and they didn't give me any useful insight.
Another person in the earlier post also had same issue and he said to keep trying. Tried I did and finally managed to get through.
I think theit system is just buggy.
though. I sent them an email to enquire on the status of my order in the morning. They just sent me the following template email after i received my SIM. Which means they don't even bother to help check.