any possibility that this just occurred? if yes, bigpay will approve the missing transaction after 10 to 15 mins.

not enough info.

1) how many reloads you actually did? 10 times or 12 times? were there reload failures/timeout observed that you didnt mention here?

2) all 12 transactions captured by pbb showing bigpay?

3) if 12 times, then PBB info is correct. BP didnt capture 2 reloads. complaint to BP to investigate the 2 missing reloads.

4) if 10 times, then PBB info is still correct because it correctly captured 2 additional transactions triggered from BP. <-- still complaint to BP because additional/erroneous reloads were triggered to charge your PBB card. since PBB captured and posted it, that means authorization was successful (i.e. with SMS OTP), captured and sent for settlement (aka posted).

this is tricky and subjective, depends on HOW you use the app during reload. only you know yourself how did you perform the reloads and whether you monitor your reloads (successful or failed).