Microsoft does not repair SL2. They might replace the whole device with a refurb after inspection. See How much does out-of-warranty service cost for your Surface device or accessory? (microsoft.com) for costs. You can use a phone to contact support https://support.microsoft.com/en-us/help/4051701/global-customer-service-phone-numbers - ask for Surface support and discuss your issue with them. Use the phone numbers listed under *For Business Users* for your location (these also work for consumers/home users).
OR
To start an exchange online, see Check your Microsoft warranty and create service orders
Also see https://support.microsoft.com/en-us/help/4023527/surface-how-to-get-service-for-surface