Build a crm software integrated with whatsapp -- 2

What do I need to have in this software 1. Being able to quickly upload a contact database from Excel to the software. 2. Being able to have unlimited contact capacity in different groups. EXAMPLE (CUSTOMER CONTACTS JOYERIA CEVALLOS, RESTAURANT CONTACTS, ETC) My country has 15 million people for example. 3. That you can sell the service to other people, (for example, someone owns a jewelry store and has 5,000 contacts, so I add their business WhatsApp to the software, and I get the list of their contacts and I can send the massive message to all your contacts, whether they have added it or not thousand characters 4. Keep the customer database stored in the system for my use so that they can hire me and at the same time grow my contact database to sell it 5. Let me send text, messages, videos and external links of pages in general. 6. I need this application to allow me to get all the contacts of the followers of any Instagram, Facebook, youtube and tik tok account. For example, hernandez hardware store has 3,000 followers on Instagram, so I can extract the WhatsApp contacts of those 3,000 people. (This exists in Brazil) 7. Being able to generate groups (for example, a group of people who have already bought from me, another group of people who have not, another group of interested people, etc.) That I can make a list with my clients separately and mine. 8. That allows me to differentiate all contacts by city, age and sex if possible, to better segment any advertising, for example women's clothing, that reaches women of that age and city. 9. Edit in time the message that I want to send massively, have the option to choose which "group" of contacts I want to send and what I want to send... for example... I have a pizza restaurant... and it's 2 in the afternoon, but people get hungry at night and I want to send the mass message at 8pm.. but I anticipate the work. 10. Being able to send a whatsapp message to all the contacts of the software if I require it without having to have me scheduled in your contacts. And several times a day without being able to block me for spam 11. That allows me to manage multiple accounts or phones with their X number of contacts. For example, 10 businesses hire me to send mass messages to their phones, I can have a list of my mass message clients. As soon as they give me their business contact that reflects all their contacts to send them the message they ask for, and at the same time I can save those contacts for my use. 12. Let me upload WhatsApp statuses, for example on a cell phone that I have 15,000 contacts, it never lets me upload a status, it collapses due to the number of contacts, I don't want that problem even if I have 500,000 contacts... 13. Have a message welcome with and without a survey format. multiple options editable. 14. Let it be in Spanish. 15. That it has an automated bot to generate multiple question options and editable automatic answers. 16. If I want to, put an editable watermark on each mass message, to advertise. 17. That you can make a zoom-style video call with many people. 18. That it can be used as a WhatsApp business since only in this way can you put ads on Facebook with a WhatsApp button. to be able to advertise and for the database to grow.. 19. That it does not have limits on the number of contacts, even if we have several accounts of up to 100,000 people. 20. That I can generate if I want to sell someone a private account to use it for a year with user login and password.