WhatsApp Bulk Messaging through web interface

Avg Bid (USD)
Project Budget (USD)
$250 - $750

Project Description:
I need to send bulk messages to my WhatsApp contacts.
I need you to set me up an interface where i can login upto 10 different WhatsApp numbers, where I can upload my contacts through a .CSV file and I must be able to schedule my messages to go out at a specific time.
The interface should also allow me to send images and videos should the need arise.
My WhatsApp contacts should be able to respond to the messages that I send out, they should appear as if they have come from my number.
An added advantage is if I could have keyword responses: for example, if my contact "whatsapp's" me the word "SALE", then there must be a template on file that is ready to respond to that keyword.

Skills required:
Bulk Marketing, Internet Marketing, Website Design
About the employer:
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