I cancelled my Prepay $19 carryover combo last week. VF sent me a SMS to confirm (see screenshot) when the combo expired without renewal.

I had another couple of data add-ons in the meanwhile so thought I may re-purchase the $19 combo once they are used up.

Since my VF Android app rarely works so I did not check in the last few days until this morning when I got SMS advising my data add-ons were used up. When I tried to re-purchase the $19 combo... surprise! It had been automatically renewed without me knowing a couple of days ago (about 4 days after the previous $19 combo expired; without carryovers)! (VF usually sends out a couple of SMS a day or two before automatic renewal, I did not receive any).

Even more surprisingly, there is no $19 deduction in the account history from the last few days yet  Anyone able to solve this mystery?