Hi PiaT,
Doing a second MBA is not out of the question - it depends on your reasons for pursuing a second MBA. Good reasons for pursuing second MBA are career path change, unprepared for first MBA, updation needed on knowledge and skills, changes in working environment which means you need more exposure, shortcoming of first MBA. You can always work on reasons based on your life journey.
I personally know at least 10 Indian MBAs who are working in Marketing - again, a grossly wrong statement. In general, marketing requires characters who are conversant with English; however a very strategic role also requires other skills which you as a non native English speaker may have better access to - analytical skills, logic, structured thinking.
Your scores could be a hindrance but it depends on your life goals and where you would like to be. (Most important questions to answer for MBA admissions).
Please contact me if you need more questions or clarifications.