For the past week, I have 2 unauthorised transactions charged to my AMEX card. One RM 827 from AirAsia that was posted when I checked M2U online transaction. The other one was alerted by the CS that one RM 31,000 online transaction from Netherlands was made. The second one was not posted. Immediately my card was suspended and was asked to collect the replacement card 2 days later. I was shocked as 31K is a very big amount, almost max out my CL. Been using credit cards for so many years and have yet to face such fraudulent transaction.

I was asked to submit my dispute form for the first transaction only after I received the statement and that would only be at the end of this month. My question is would this be too late?

Feeling so vulnerable, I might as well cut down my CL since I don't need such an amount most of the time. If and when when I need a bigger limit would the CS entertain such request on an ad-hoc basis?