Customer Service Flow Chart - process of setting up new department to manage Customer calls, Sales, Complains

Hello I need Customer service department workflow, we are into the process of setting up a new department to manage Customer calls, Sales, Complains etc.

We do not work for your organisation, so have no idea how it works. Therefore we cannot write your work flow process.

You need to start by documenting everything you are doing now, and how the organisation currently manages the process. Then you can draw it all together into a new work flow process specifically designed for your organisation.

None of these sorts of things are "one-size-fits all" propositions. They must be designed for each organisation to work effectively.