A few things to note:I did that too but it said daily limit reached,I have tried all the tricks I know,someone please help I'm getting frustrated been trying to pay for over 2weeks now,and as a lawyers it's only IQAS everyone has adviced me to use,I don't even know what to do anymore.
Enable pop-ups
internet speed of 50mbps or more
Hit the pay button at 20:44 IST, click preview and submit asap. Don't wait for it to download but keep looking at screen coz sometimes it does download first and then you need to click on submit AGAIN. Also, try using Edge browser, it might work for you today.