How to pay for Personal Bot
Locate SmartBots terminal. The easiest way is to teleport to SmartBots office. You can also use SmartBots Terminals in partner locations.
Instructions
Touch SmartBots Terminal:

Click on the "Payments..." button:

Click on the "Pay bot" button:

Choose your bot from the list, and click corresponding button:

Short instruction appears. Follow instruction and right-click the terminal:

Right click on the terminal and select pay

Pay the desired amount using SL Viewer window:

Note: If you have a lot of personal bots
If you have a lot of personal bots, only 7 bots per page will be displayed:

Click on the "More bots" button to list pages and access more of your bots.
Troubleshooting
Q: The SL viewer payment window does not contain any numbers!
A: Just repeat the procedure, and payment window will be fixed. This is a bug in the SL Viewer.