Q.How will most upset customers react if you offer a sincere apology?

If you apology does not include a solution they will be upset 

It depends on the reason behind their upset. Some are expecting some kind of compensation, a sincere apology is then not enough

It depends on the customer and the main problem. Some customers accept your apology, and others may try to take advantage of this and want to escalate the issue !

1. When sincere apology is made to an customer, most of them will appreciate and ask us to not make a mistake again.