Hello
While your undergrad GPA is on the lower side, you can showcase your commitment to learning through taking a few additional courses. You can also use the optional essay to explain your performance.
A GMAT score above 720 will serve to reassure the admissions committee about your capability to tackle the MBA.
While your work experience is fine, you will need stellar essays and strong LORs to further bolster your chances of success. If you have excelled at any extracurricular activities, these will add to your advantage as well.
Is there any particular reason behind applying to Oxford? Are you considering any other universities?
All the best!