AMBank review: Credit card centre

As credit card customer of ambank i received a statement for the mth of june 16 indicate 2 payment omitted in sept 2015 which is almost 6 mth ago. Now they demand for payment without giving the cust to check through on the said transaction whether valid or not...but now start charging late charges. My Question is how many of us still keeping our receipt of payment for the last 6mth? If we didnt pay. they charge late charges if they make mistake by ommit the transaction also charge late charges. Do u think is fair for cust? All this years maintain card with them never have late charges, first time in April 16 when cal they promise reverse in next statement..but in may 16 statement instead of reverse they charge again late charge for the late charge in april...now they reverse the May late charge but not april which is the actual late charge. That means they only reverse their mistake in may but never attend to the customers req. DO NOT APPLY ANY CARD FRM AMBANK AS THEY CANT BE TRUSTED AND NOT CUSTOMER FRIENDLY..LOOK AT THEIR DIRTY TECHNIC INSTEAD OF RESERVE CHARGE THEY CHARGED AGAIN AND REVERSE THEIR MISTAKE ONLY...THEIR STATEMENT MENTION ANY DISCREPANCY MUST NOTIFY IN 14 DAYS BUT THEY NOTIFY CUSTOMER ONLY AFTER 6 MTH...WHAT A DOUBLE STANDARD..WHAT IS THE PURPOSE OF THAT CLAUSE IN YOUR STATEMENT?...TILL NOW CANT RECTIFY MY PROBLEM. ASK ME TO REMIT FULL PAYMENT TO AVOID LATE CHARGES BEFORE PROVIDE PROOF OF PURCHASE. WHAT A LOUSY BANK WITH LOUSY SERVICE...