From experience, I have found that Customer service starts before the customer has even bought an item from you. Beyond price, prospective buyers also want to see how available a company is If they have a question or concern. The more ways they have to reach you, the more likely any concerns they have can be resolved quickly.
The important thing to remember when considering entering a Customer Service number is it should be actively monitored and answered. A phone that doesn’t have anyone answering it, or that doesn’t have a professional voice mail message, can create a frustrating customer experience.
To add your Customer service phone number: go to your Settings in your seller account, under Seller Information.