Hi TS,
Retaking Poly diploma is not as easy as one may think and here is why;
1) Your ex-Poly student status will work against you for applying to another diploma course as your admission is only base on availablity and then Merit, not the other way round like you first apply.
2) Tuition grants issue. Although government has subsides nine semesters of tuition grant to a student, you already use six out of nine so you will have to pay the rest in full (that is provided you did not retake any semester first time round)
So you have a choice as below;
1) You still want to proceed to get another Poly diploma but your chances of getting in are slim if the course you want is popular or a low COP course.
2) You can go for the Diploma Conversion courses available in Polys to get another Special diploma or diploma or higher diploma (using your current diploma cert)
This to me is a good choice if the course available can be apply via DAE and is a conversion course (usually duration of course is 6-12 months) if you need the diploma for your career advancement
3) Go the private certificate way. If you do not want to waste any more time in studying for another diploma, you can as most people say take the private degree route
Many people want to retake their diploma for many reasons, there is no right or wrong reasons. Do just what your head and heart tell you to and be determine in your selected choice to archive your goal.
Good luck!
Calvin