I'm being charged monthly for Dropbox, but I don't have a paid subscription.

I have received a monthly charge of $11.99 for the past few years for a Dropbox plan that I don't have. I've even had to cancel my debit card and receive a new number, and this transaction still shows up every month. I've tried to ignore this because Dropbox makes it impossible to solve this problem but I'm sick of my money being stolen every month.

I don't have 12 digit transaction ID so it's impossible to use the credit/debit card lookup tool - The transaction ID I have for this charge is "DROPBOX*+9 digits".

I have 2 Dropbox accounts - One with my personal email, one with my work email. Both use the free plan, so I shouldn't be getting charged every month. I suspect this may be linked to my old university email, but I no longer have access to that account since I graduated 7 years ago. I don't think I ever paid for an account using that address, but this is the only thing I can think of. If I have a paid account with that address, I want to cancel it but can't figure out how. I shouldn't have to have access to that email address to do so - Since the charge is coming in to my bank account that I DO have access to. Dropbox, stop charging me and let me delete this old account!!!

I don't even know if this is the right place to post this but I've tried cancelling my debit card, contacting customer support, using the transaction ID lookup tool, etc. and NOTHING has worked. I'm seriously at my wits end here. This honestly feels like fraud.