Restore CRM system in PHP

You have a CRM that logs customer requests. These customers are credited with bonuses that they can spend in vending machines. there is a failure and then the codes are not received by the clients
It is also necessary to transfer the system to a new server, create and transfer a database, explain the logic of the code (the developer cannot be found), add marketing functions (I will describe below, but you need to explain personally)
Regular accrual of bonuses
Bonus limit
Separation of rights between users who create records in CRM
I WORK EXCLUSIVELY THROUGH A SECURE TRANSACTION