Automation for Marketing using a number of series to make them work in one go

I need help with setting up a marketing automation platform.
Basic tasks for that marketing automation paltform to be able to do are:
1. Registration
2. collecting payments after registration
3. sending invites to the registered person
4. sending pre defined mails to the registered person
5. sending pre defined whatsapp texts to that person
6. sending pre defined texts to that person
7. automated calls to that person