As a retired business owner, there is no excuse for not dealing with customers. The customer is reason the business is in existence. No matter, answer the phone, e-mail, or what ever. I would get out of bed at three in the morning for any of my clients. There is ALWAYS time for customer contact, no matter what. If one makes the choice to have a business that requires customer service, then one should be prepared to service the customer 24/7. I retired at the age of 40 because I took care of customers and spent many off hours doing so. You might remember, the "service station", vacuum, oil check, sweep out the car, check the tires, and a big "THANK YOU". Think 'bout it.