You can export your data with the EXP utility provided by Oracle. The command should be like the following:
exp user/password@server_host_name:port/Servicename file=outputfilename.dmp
You can also use SQL Developer or utilities provided by APEX to export your data. In case you want us to schedule a backup for you (in addition to what we do regularly ourselves), please open a ticket and the backup will be scheduled and provided to you in your FTP folder.