Official comment

We added the Malaysian Ringgits to ONTRAPORT to allow your order forms to show it instead of the dollar symbol ($).
At the current time, the only gateway we support that also will support Malaysian companies and bill in Malaysian Ringgits is eWAY at https://eway.io/my
You can use eWay and then navigate to your profile icon (upper right corner) > Administration > Data > Localization. Select Malaysian Ringgits as the currency under Select your preferred currency.