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I haven't gotten anything back yet. The arbitration process has just started, and it's going to be a while before it's resolved as it isn't a quick process.
You have to follow the process as listed in the Microsoft Services Agreement, https://www.microsoft.com/en-us/servicesagreement, it's under Binding Arbitration and Class Action Waiver (section 15).
You need to follow the steps in section 15 paragraph b first.
b. Mail a Notice of Dispute First. If you have a dispute and our customer service representatives can’t resolve it, send a Notice of Dispute by U.S. Mail to Microsoft Corporation, ATTN: CELA Arbitration, One Microsoft Way, Redmond, WA 98052-6399, U.S.A. (or to your mobile phone carrier at its principal place of business in the United States marked ATTN: Legal Department). Tell us your name, address, how to contact you, what the problem is, and what you want. A form is available at https://go.microsoft.com/fwlink/?LinkId=245499. We’ll do the same if we have a dispute with you. After 60 days, you or we may start an arbitration if the dispute is unresolved.
If they haven't resolved it in 60 days, you can then start arbitration by following the steps in section 15 paragraph d.
d. Arbitration Procedure. The AAA will conduct any arbitration under its Commercial Arbitration Rules (or if you are an individual and use the Services for personal or household use, or if the value of the dispute is $75,000 or less whether or not you are an individual or how you use the Services, its Consumer Arbitration Rules). For more information, see www.adr.org or call 1-800-778-7879. To start an arbitration, submit the form available at https://go.microsoft.com/fwlink/?LinkId=245497 to the AAA and mail a copy to us. In a dispute involving $25,000 or less, any hearing will be telephonic unless the arbitrator finds good cause to hold an in-person hearing instead. Any in-person hearing will take place in your county of residence (or, if a business, your principal place of business) or our principal place of business—King County, Washington if your dispute is with Microsoft. You choose. The arbitrator may award the same damages to you individually as a court could. The arbitrator may award declaratory or injunctive relief only to you individually to satisfy your individual claim. Under AAA Rules, the arbitrator rules on his or her own jurisdiction, including the arbitrability of any claim. But a court has exclusive authority to enforce the prohibition on arbitration on a class-wide basis or in a representative capacity.
If you don't want to do either of those, according to section 15 paragraph c, you may also file a case in small claims court.
c. Small Claims Court Option. Instead of mailing a Notice of Dispute, you may sue us in small claims court in your county of residence (or, if a business, your principal place of business) or King County, Washington, U.S.A. if you meet the court’s requirements.