How to cancel Microsoft app mountain view charger,?
First see:
https://www.reddit.com/r/GoogleSupport/comments/1gadbdb/google_onemountain_view_charges
Or this may be a completely fraudulent charge. There might not be a Google Mountainview app, the money isn't going to Google or Microsoft and neither Google nor Microsoft can help you with this.
Sign in to your Microsoft account at https://account.microsoft.com/
On the left, click on Services & subscriptions. Is this listed?
Still on the left, click on Order History. Change "ordered within" to 12 months. Is this charge listed?
If this charge is not listed in your Microsoft account, it's a fraudulent charge that you should dispute with your bank or card company. If they are automatically taking money from your account every month, you might have to cancel the card. Your card company will work with you on this.
More info in this article.
How to investigate a billing charge from Microsoft https://support.microsoft.com/en-us/account-billing/how-to-investigate-a-billing-charge-from-microsoft-or-msbill-info-398c5328-364c-d5e4-ea8f-f5ad60562a93
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