Do I have any chance at ER or IB at a BB Bank?

It seems like joining a fraternity or a sorority is the way to go if you want to have a legit chance at any BB Banks. I know two people that graduated from a no-name school and landed summer internships and full time positions at GS. One of them I know for a fact had a 3.4 GPA. So it seems that it's all about the connections....
I am glad I saw this threat because, my college career started out pretty terrible. I moved across continents, had to learn english for months, then I had to write papers my first semester in college, which messed up my GPA big time. It was around 2.4 - 2.7. My academic advisor basically told me I will never make it to the Business School because they require a minimum 3.0. I didn't even listen to her, because at my previous foreign business school back home, I was in the top 10 of my class every semester because all I do is study. So I just kept taking more classes and studying really hard. When I finally got 3.0, I was accepted into the Business School, I even received an offer for a Risk Management/ Corporate Finance Internship, which I accepted. I thought, this is great right. I will keep working harder to get in a even better position. I learned a lot during the internship, which lasted for 1 year 7 months. Even to date, I get offers for full time position at similar companies. Unfortunately, the internship didn't go well. My boss was a very sensitive person who brought family issues to work (a co worker told me about it when I asked why her behavior was so off sometimes, it even affects my work) and it was almost like she was lashing out people's work, especially mine. Additionally, I was overworked, I didn't have enough time to study between the internship, commuting, and even working on weekends. I even ask if I could structure my schedule like the other interns and just come on certain days, instead of everyday. She wouldn't have it. Though, it gave me significant experience, I regret taking it because I could have taken another internship and be okay overall, especially academically. My GPA suffered to below 3.0. I am currently sitting with a 2.8 with a crushed dream of every getting into a BB for ER or IB, though I prefer ER. Now I have to graduate and keep taking classes in the hopes of reaching 3.0 because I have both Finance and Economics as majors and a Math minor. By December, I will have to take 40+ hours to get to a 3.1 GPA, including retaking some classes. Any advice? I know I am sitting duck a this point.