The diner has an issue with the order. What can I do? Grubhub for Drivers Updated January 13, 2019 20:06 Follow Advise the diner to call into Grubhub Customer Care at 877-585-1085. Customer Care will help them sort out the issue. After letting the diner know to contact Customer Care, move onto the next delivery. Related articles The diner is not answering my call. What can I do? Someone else picked up my order at the restaurant. What can I do? Where should I park when I arrive at the restaurant? I received an offer in a neighborhood that I believe is unsafe. What do I do? I’m going to be late for an order. What can I do? Comments 0 comments Article is closed for comments.