Right Livelihood and Working in Technical Support
At the core of The Right Livelihood training rule is the same principle as behind the rest of the Eightfold Path: to stop creating causes of suffering.
The jobs and professions that involve creating suffering, either directly - by killing or torturing others, or indirectly - by creating latent conditions for conflict, confusion, physical or mental sickness etc - are obviously unwholesome.
Jobs that focus on healing, rescuing, reconciling, educating about healthy lifestyles, etc. - in other words those that create direct or indirect causes of peace and harmony - are obviously wholesome.
Everything else falls somewhere in between. A job that you describe definitely falls on the &quot;good&quot; side of the spectrum, since like you said it saves the people from frustration and reconciles the potential conflict between them and the company providing the service.
Perhaps if you transmit enough warmth in your communication you can even make a deep and long-lasting difference in someone's life. This definitely sounds like a good livelihood, in my opinion.