First, stop talking to the NSF clerk, he can't do sh!t.
Second, talk to the officer in charge, all ICT units are handle by
a active brigade. The officer is usually a regular. Talk in a firm
and assertive tone that u mean business and not a chow keng ginna
trying to keng his way out of ICT.
Third, go to ur school and request a higher rank person, preferable
a professor, associate professor, someone with a Doctor something
something to write a letter for you. Best, u can get a few of them
to write. (I know it is usually the school responsibilities but if
u are on good terms with ur teachers, prof, etc he can add in some
weight into ur letter)
Lastly, request the phone number of ur ICT CO, call him up and
discuss with him.
Note, the above are just recommendation, it is not a 100% guarantee
it will approved. Approval is very much depends on ur unit.
Furthermore, u SHLD prepare for the WORST CASE SCENARIO. i.e. u lan
lan hab to do ICT. Then u have to make sure u can cover up for the
lost time. U can discuss with ur ICT CO on compromise, i.e. allow u
to take nights off or stay-out everyday during ur ICT. Most NS CO
are also working ppl, so they tend to be more understanding and
more approachable with these situations compared to the
regulars.