Welcome to Vodafone Community
Curious about the purpose of your college project. Is that business related? If it helps, here's the list of software services and tools that Vodafone uses in general - https://www.featuredcustomers.com/customer/vodafone/reviews
Perhaps, there're some other tools mentioned in the reviews on other sites.
So i'm doing a college project about vodafone and i wanted to know the type of software/s that you use in the HR department
This link is also will be helpful for your assignment: https://www.glassdoor.com/Interview/Vodafone-Software-Developer-Interview-Questions-EI_IE5775.0,8_KO...
There you'll find software developers interviews and, if it's interesting for you, also read HR interviews