There's a technology called phone!

if you are worried, just walk into any hsbc bank, cut the card together with your cancellation letter, and ask them to acknowledge receipt.

It took longer than expect, but HSBC indeed combined my cancelled amanah mpower credit card credit limit to the only card I have now which is visa signature card. 😜
Yes, no need minimum 1 swipe a month. As long as there are total 12 swipes a year.

actually the more interesting qns here is that if the swipes applicable to both online purchase and retail or it is just purely for retail.