I have an unauthorized recurring Dropbox Sign payment.

I have received this payment on my card and cant find any active accounts that would be charged.

Seems I am not allowed to chat with support with out paying them (I am paying them and dont want to)

 

Does anyone know how to find out how to dispute this and talk to a human that can cancel this payment?

 

My payments show this: 

RECURRING PAYMENT AUTHORIZED ON 08/19 DROPBOX SIGN

MONTH HTTPSWWW.HELL CA 

S584233214671310

 

Also I have tried to look this up with no help. I go to submit a ticket for help, but all the options are greyed out (because they won't help unless you pay, but I did pay for several months without authorization) 

 

Thanks for anyone's help!