This should be an activity diagram, not a system sequence diagram

Thank you

Write a Fully developed use case scenario for a Customer getting service from an Internet Company. The customer is a new customer. The user must create a new user ID, decide on internet speed, include service address, telephoen number, number of devices. The price of the service will depend on the speed. The system automatically bills the customer every month so a credit card MUST be on file. The customer has a choice of modems and routers and install. Create an activity diagram based on the above use case You can either NEATLY draw the activity diagram and Use Case Description or complete the project in a document software. (Word, notepad, google doc) I cannot open pages so take a screenshot and send that if it's pages. (Sorry)