I have an Amplify Signature Visa (issued via Bank of Melbourne) which came with bonus points and then another set of bonus points in the second year. I received the bonus points in year 1, but in year 2 they never came through.
Unfortunately, if the T&Cs say that the points will take 3 months, they won’t look at your case until the 3 months have passed.
If it’s been 3 months and you still haven’t received your points, my recommendation is that you contact the bank via Facebook message: I recall that their telephone support was a bit of a schmozzle (kept being told to call another number, ridiculously long hold times, kept getting cut off while on hold … that sort of thing), but their Social Media team is excellent. Within a couple of days of contacting them via Facebook and explaining the situation, I received my bonus points.
(Even if your card has been issued by a bank other than BoM, it’s the same customer service team).
Let us know how you go!