165 dollars for a "free trial"

there have been multiple attempted charges on my account for 165 dollars my card blocks these charges due to me only having 9 dollars in my bank account, I only had a free trial which I cancelled and despite all of my efforts to identify the charge, there is no actual source for it, I can't even delete my account. So now I am stuck in a tight spot where If I do get money in my account it will be immediately taken out because of this fee, and I am just a college student who is barely getting by every day. please help