CHAT PLATAFORM AS UBER FOR ANSWER CLIENTS QUESTIONS!

I need to creat a CHAT plataform to integrate with our app This plataform will work as Uber but beside drives we will use professionals to answer clients questions! - The plataform need to ranking the backoffice porfessional with quality service by starts givem by clients feed back - We will have more than 100 professional register in our plataform. We need to redictly the client question for the available professional that is login in our plataform, we want to creat a system as UBER . The professionals will have the choice to answer or not the clients question. If the professional get into a Chat and help clientes he will recive a fee for the time that he spend helping the client. When the Calls end the professional will see the amount of money that he maked! We will integrate a SPLIT Payment Getway for professional recive and control the amount that he makes trow the plataform! This Chat will be available and integrate in our app androide and IOS and website app plataform.