Just wanted to share my experience last night at 1.30am calling BP customer service because I suddenly received a BP spending notification for a small amount (i.e. <RM20) which I didn't spend.
This is a merchant I regularly use and I suspect it may have been a duplicate transaction for a failed BP online transaction (2 weeks ago). However, I still wanted to take precautions and obtain information from BP to send to merchant to reverse the double charge.
Got through to the Lost and Stolen card representative pretty quickly, and after a quick and simple verification, she was able to understand my situation perfectly and provide me with transaction details (which she also sent to my e-mail). She also set out 2 options:
1. She would block card, file dispute form, and send me a new card (if I was reporting under fraud case); OR
2. I could freeze my own card and provide the transaction details to merchant to reverse (if this was a duplicate charge by the merchant).
I chose the latter. The CS also confirmed that Freezing / Unfreezing is not an issue, and simply a way to "lock" your wallet. She recommended that I do this if I wanted to take precautions while the merchant was investigating the duplicate charge.
Within 3 minutes I received an e-mail from BP with a screenshot of all the transaction details. In my experience, this is much faster than a bank response as they normally need to "refer this to the respective department".
maybank took more than 1 month to check.