Biology or computer science major??? Please help!!!

I got a full offer for biomedical sciences in a well known uni and have already paid for it but classes have not started yet. However only after I paid for it I am thinking of doing software engineering or computer science because i heard that there are more jobs in it and it is more highly reputable. BTW, I do not wish to do medicine in my future. My pre-u results were not that good for me to do comp science or software engineering in my uni however I can do it in another uni but the uni is not well known. So the question is should I continue biomed sciences in my current uni and thrive my best in it or should i do computer science in a less well known uni? Also with a bachelor in biomedical sciences, what masters degree can i get and what jobs can I do?Lets say if i want to do marketing of health products, can I do a masters in business administration/health administration? And lastly, for your case biology majors what do you do now?

@powerwoman it might help if you give the names of the colleges you are seeking. without enough info., I would pick Computer Science at a school that you are comfortable with.