أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
well
keep calm him
listen all what he say until he finish
solve his problem as you can
don't let him get out until he smile and thank him for his attention and patience
don't lose a customer
and alwyas know that " customer is always right"
:)
Just keep listening to his/her complaint and don't try to interrupt till he/she is calm down. then try to negotiate.
