When you paid, you should have a receipt depending on how you make the payment. There should be a transaction code or similar that proves that you have paid.

What did you put in ref1?
ref1 is the receipt number

Below is what I printed and submitted
[attachmentid=10296749]

You can only make appointment only after you've keyed in the payment details.

Initially I had issue with my payment too via jompay. Turns out it needs half day of processing before the jompay receipt number is pushed through their system.

Hi TS goodluck on your interview and please tell me how it went.

Yes i am thinking to get one
But no plan to goto USA any sooner though, just wanna get the visa first and see

Do we need to wear formal for the interview?
I am not applying for business purpose

what? thats so short notice? usually the appointment can be made two - 3 weeks in advance after payment.

TS, put on some sunscreen ya... you will need to line up outside the embassy to wait for your turn to enter. Mine took 1hr (arrival at embassy until collection of my belongings at the guard post). The actual interview was less than 2 mins. Interviewer only wanted to know the duration of stay, who was funding it, and which states I was planning to visit. Next thing I knew, he said 'Enjoy your trip!'

I prepared a complete itinerary, and printed so much stuff, he wasn't interested to see any.

Yes i am thinking to get one
But no plan to goto USA any sooner though, just wanna get the visa first and see

Do we need to wear formal for the interview?
I am not applying for business purpose

Omg congratulations!!
I envy you TS.
What sort of question did they asked?
Did you wear formal?