Checkers poor customer service

I almost had an accident because a Checkers 60 Sixty deliveryman was driving very dangerously and recklessly. Reporting this to Checkers was very unsatisfactory. They assume no responsibility whatsoever because they say the deliverymen are 'outsourced', yet they must bear some responsibility because the deliverymen are representing their company. They refuse flatly to give thje contact details of the company to whom they have outsourced the deliveries, saying vaguely that they willl pass on the details. This means that I have no way of knowing what action, if any, has been taken and what will be done to prevent further reckless driving. Appalling customer service!