This test purchase was cancelled because it was not acknowledged. You should ensure all purchases ar

[JeffDUnity3D]

@TSR_Rajput

I have implemented Scripteed IAP, but still receiving a Cancellation email from Google. No, they are not subscriptions. They are Non-consumable and consumable IAPs.
I have an idea to confirm this issue, try purchasing the same IAP again and again as a tester. If after 6-10 IAP purchases, the cancellation starts, then it can clarify that it is by Google.
In my case, after the 10th IAP purchase. Cancellation started from the 11th consumable IAP purchase.
Suggesting this because my code is perfectly alright. Everything is working well.
If you don’t get any cancellations, then I have to look again into the issue.

I suspect that Google is limiting your purchases after a certain number during testing. Use a different tester account to confirm. I always use several tester accounts, and several similar products for testing. Compare your code to the Sample IAP Project v3 here Sample IAP Project