First you will think of going to maplesea website to top up @cash this is the most direct way.
But to get cheaper @cash, you can find hsquarez
1. Find hsquarez
https://www.facebook.com/hsquarez/
@cash rate not good enough?
2. Find in discord group
Maplesea has a secret discord group, that you can join when you ask your guild master, only pro guild master has the discord invitation link.
3. Find alternative website on Google like
https://www.seagm.com/asiasoft-acash-singapore
https://www.offgamers.com/sg/en/playpark/asiasoft-cash-singapore
4. If really don't have lobang / seller, then go to Asiasoft to top up.
https://mspassport.playpark.com/
Try to get credit card cash back etc