Ah. Don’t be too worried. SGD 17 is the right amount for courier fees.
There may or may not be a SGD 44 Package Transmission you’d have to pay. If you have provided biometrics at the Canada Visa Application Centre – Singapore with the current application, the package transmission fee is waived off. However, if the biometrics is collected from a different Canada Visa Application Centre, a package transmission fee of 44.00 SGD will apply.
Not to worry though. VFS will get in touch with you if they need anything additional.