The contact form stores the message in the site database before attempting an email alert, so an email problem does not discard your submission.
Keep the displayed WFG reference. The administrator can move the record through Open, In progress, Resolved, Rejected and Archived statuses.
A message identified as a data-protection complaint is also entered into the protected complaints workflow. Its acknowledgement deadline, investigation progress and outcome evidence are tracked separately; this does not restrict your right to contact the Information Commissioner's Office.