I tried activating

I tried activating plugins into my Wordpress Blog and now I am unable to access my dashboard or log into my account. I get the following: "Parse error: syntax error, unexpected '[' in /home....." This is from the Braintree Plug in

I tried downloading Filezilla since online said to use an FTP but I'm not able to connect to my account and change the code. Can you help me fix this?