Everytime I call I can't reach anyone for at least 10 minutes; where's the customer service?

I'll add to that the majority of the workers there are incomptant and rely on the 2 on each shift that do everything

Home Depot doesn't have a dedicated customer service to answer phones - it's usually the crew working on the floor that will answer the phone as well, and hence they are busy with current customers, they can't come running to answer the phone until they are finished with whoever is in the store.