Don't worry, you can add these optional packages by yourself.
In your personal account, go to Packages(1) and click on the title(2) of the purchased package.

A window will open where you can purchase the optional package you need,

marking it in the corresponding window. On the screenshot, the optional package Sport(4) is chosen for addition, and the optional package For Adults(3) is not selected.
After selecting an option, you need to click the Buy selected(5) button.
You should have the necessary amount of money in your balance. The package term is automatically set to be the same as that of the main package, it cannot be changed.
Confirm your actions by clicking the Confirm(6) button.

The purchase of an optional package will be confirmed with information in the upper right corner and in your package list you will see the name of the purchased option.

After purchasing options, you need to refresh the playlist in the player, and if you added an option with adult channels (For Adults), then before refreshing the playlist in the player, you need to enable the upload of these channels to the playlist (it is disabled by default).
It's not possible to stop options separately, only together with the main package.
