WhatsApp is integrated on our Zoho Desk IM.

Purpose of the integration was to offer a better client experience when communicating with clients. WhatsApp business cannot be managed effectively and multiple conversations cause some client chats to  be missed.

The incoming queries from clients is now working well after WhatsApp's integration, however it is not possible to give the client a quick update on the progress of his project using the integrated WhatsApp. These updates must still be communicated on WhatsApp business, using a different contact number and effectively defeating the purpose of having WhatsApp integrated, having a singel managed, ticketing type solution for WhatsApp engagements.

How can I start a conversation with an existing contact using the integrated WhatsApp on Zoho Desk?