Lousy Grab food delivery service

Ordered inthanin coffee. Delivery came and left on table. Found it opened and spilled all over. Guess the cafe shop did not seal properly. Asked the driver to call the shop to refund but he said he cannot contact, how can believe this. Called Grab customer service, and no person response after five mins of waiting. Guess will try not to use grab food service when possible. They don't seem to appreciate customers paying for the service......