If you don't like the Store replacing My Games & Apps on the Dashboard answer no on the...

I don't really pay attention to ads, especially on the dashboard. I turn my Xbox on and either launch a app, go to the store, or play a game.

Simple answer. If you don't like the apps, don't use them. Play your games.

Thanks for the answer, but I would like an answer from an official representative,
to write to the store where I bought it and try to replace the code.

Actually, the first answer was mostly correct. It says on the in-game store not to buy off the dashboard or you will have to buy it again. Always buy it from the in-game store.

Have you checked to see that the Microsoft Store and Experience Host are up to date? Have you tried opening the Microsoft Store with your parent account?

If everything is up to date and you can't open the Microsoft Store with your parent account then maybe you could try removing the Microsoft Store app and downloading it again.

Alternatively, if you would like to provide additional data to Microsoft for troubleshooting even if you don't have your console in the Dashboard Preview program, try downloading the Xbox Insider app. Once app is installed, press and hold the Xbox nexus
button on your controller...then select the Report a Problem button. Select Apps as the category, then Microsoft Store as the sub-category and enter in your problem title and description. The Dashboard team will then be able to use your report to help them
determine if there is an issue that needs to be fixed with a new Dashboard or app update.

Good luck!