I haven't read judgement but my view was that expressing my opinion is not defamatory.
The use of the number was not an invasion of privacy given that it is freely available.

The court application instead of resolving the issue shows the lack of care.
It would have been cheaper to give the guy a new phone and airtime. They could have turned the lemon into lemonade.
I bet Nandos would have turned such an incident into prime marketing opportunity.