For TNG eWallet and GO+ (Unable to reload into TNG eWallet, Problem with 6-digit pin, How to Cash in into/Cash out from GO+)
You may submit your queries to https://tngd.my/careline-webform
You may also call the TNGD careline at +(603) 5022 3888. The operating hours are Monday to Sunday, 7.00am to 10.00pm (including public holidays).
For Principal e-Cash (Earning calculation, failed Cash Out to bank account, more info about the fund and Principal Malaysia)
You may email your queries to firstname.lastname@example.org.
You may also call Principal Customer Care at +(603) 7723 3800. The operating hours are Monday to Sunday, 8.45am to 5.45pm (including public holidays).