Do you remember when was the last time you login your accounts detail outside your phone/pc? Sounds like your account has been compromised.

When did the transactions occurred? If it's just recently then call bank immediately and tell them to activate kill switch

Final charge is the RM5.73. Overseas payment are usually shown like this in Maybank statement, for example:

01/01 Payment RM6
03/01 Pre-Auth Refund RM6
03/01 (actual) Payment RM5.98 - will be few cents +/- off due to adjust in exchange rate

I went to China last weeks and made some payments there with my debit card, this is how it showed in my Maybank statement:

this one already too late, it's the first RM7.12 from your first post, last transaction (top)

now you have to wait for dispute with your bank for the RM7.05 and the RM5.73

you sure no one had touched your devices before or anything? don't have any 3rd party apk installed in your phone, and have you done changing password as well?

Set contactless limit to 0

My OCBC card now can't paywave for unknown reason, maybe got touched by water or something, can't paywave but only insert+PIN to use it