Service as a discipline is made up of several other disciplines. You can draw a straight line between Service and Marketing, Human Resources, Operations and Logistics, IT, and Psychology. Most people study marketing or operations and logistics. Whatever you study, you will need to learn about customer centricity, strategy, culture, service design, customer experience, service quality, and other topics. It is not just the qualification or degree that is important, but what courses you actually study. I would recommend studying at a top service institution such as Arizona State, Maryland, or Texas A&M (there are a few more). In addition to the academic qualification, I would read some of the managerial books. Karl Albrecht, John DiJulius, Shep Hyken, Ron Kaufman, and several others can give you a great perspective as well. Some of these have great blogs as well. You should try and get exposed to several different streams of thought, so that you will be able to mix and match your knowledge with your particular service situation. There is no “one size fits all”.