Q: Need help on a survey to identify the problems MMU students face using Grab services.
It seems you are referring to Grab Services, which is a technology-enabled food delivery and transport service. MMU perhaps refers to a university in a geography in which Grab operates. So, it seems students of MMU are facing challenges with the services Grab has been providing, and you wish to identify these problems through a survey. In that case, a questionnaire survey would perhaps be your best option. Additionally, based on the exact definition of your research problem, you may also wish to consider a Yes/No survey. Here then are a couple of resources to help you with this:
Hope that helps. And all the best for your survey!