For people taking up credit card churning, I can only suggest a mindset where things can go wrong. If bonus points aren't awarded timely, or require additional effort resolve issues - that we exercise patience or let it go. Perhaps another unsolicited suggestion - to not use this as a reason to spend outside your means to over compensate meeting promotion criteria.
Unsolicited musings aside, my experience was that I got soft confirmation of having fulfilled the spend criteria via online chat With Westpac. I also had a similar experience of them questioning my transactions/merchant names and summing up my spend in call when I lodgged a formal query to the Rewards team when points didn't land after 90 days.
Separately, if you want to do some additional checks - when looking at the eligible purchases for the promotion as of this post:
And compare it to the Westpac Altitude Terms & Conditions
One transaction type that stands out to me are 'gambling transactions', where it seems like its possible to earn points per usual spend per the T&C, but not eligible for the Eligible purchases under the promotion (which means that points earn on statement end may not be a reliable indicator for promotion eligibility). Perhaps something to be wary of.
The T&Cs and promotional material is typically removed when the promotion ends, irrespective of customers still waiting for the elapsed time to pass. A final suggestion is taking a downloaded copy of the promotional material so you have it on hand if you do need to pursue it if you're still waiting after x months.