Astro just replied me via twitter and confirm payment via Astro Self Service Portal accept Amex (issued by local bank) 

Confirm Viewnet accept Amex with t&c.

T&c -
1. Management office accept AMEX and website showed.
2. Staff don't like AMex.
3. Talk nicely to staff said want to pay by Amex.
4. If they reject, tell them their office said accept AMEX.
5. If front counter ( selling laptop ) don't accept, tell them nicely to transfer to cashier counter for payment.
6. Talk nicely to their staff cause they work for long hour and day, that why their attitude different.
7. Lastly said that you only have Amex.

This is how I went through the payment.

Yeah, since it's useless then cancel the M2Cards.
I'm considering to cancel mine too if I can have a better card for my retail purchases. I usually just collect points when I help others to swipe for branded stuff using my card.

My Ikhwan is just for back up only, my groceries spending go to Wise most of the time.

What a news. Though I buy in Brands more often compared to Padini but still feel sad.
Hopefully Uniqlo all these will not be removed.