CUSTOMER MANAGMENT SYSTE

i need system that client can register and select type of product they want to use
client side
registration
view contract start and exp
check the invoice for period
period monthtly , 3 month , 6 month 1 year
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admin side
customer management (view in grid - change status - send reminder)
admin user management ( add user - assign permission )
invoice management ( create invoice - view invoice grid )