You can pay your unifi Bil through myunifi App,unifi Portal and other selected channel that you may prefer it
as long as you know your account number , you can pay bill in many way .
for myself , alway using shopeepay to pay my unifi bill , in the shopee apps , process to pay bill , then key in my account number , then Done .
You can make payment via this payment channels > https://community.unifi.com.my/t5/Bill-Payment/Where-can-I-pay-my-unifi-bills/ta-p/8927
Stay safe! 😊