https://www.pbebank.com/Personal-Banking/Pr...e-e-Vouche.aspx

New campaign

It mentioned up to rm100. I think it is one prize but if use VS need to spend rm800 n get rm100.
If use Quantum Visa spend rm500 get rm50.

Only one prize, RM100 is for VI and VS, while others Visa below get RM50:

The Public Bank Credit Cards which are eligible for the Campaign are as follows: -
x Public Bank Visa Infinite Credit Card
x Public Bank Visa Signature Credit Card
x Public Bank Visa Platinum Credit Card
x Mutual Gold-Public Bank Visa Platinum Credit Card
x Public Bank Quantum Visa Credit Card

From its general TnC:

The details of the purchases which the Cardmember intends to pay by instalments under the Flexipay must be made known to PBB/PIBB 3 days after the purchase is
made and 5 days before the next statement date.

URL: https://www.pbebank.com/pdf/Promotions/tc_f...y-juldec19.aspx

I was in the same situation but managed to convert my purchase to FPP. Statement amount due remains and the purchase amount credited  was used as part of payment.

any T&C what cannot be use?

It keeps saying I need to have authenticate mobile number or token? After the security question -.-