Local saves are stored here; Android/data/com.playsportgames.mmm2017/files/Saves
In order to access these if you restart your device and then plug it into your computer, enable data transfers, and navigate to the following folder "Android/data/com.playsportgames.mmm2017/files/Saves". Here you will see your save in here either called SlotOne.msv, SlotTwo.msv or SlotThree.msv depending on which slot you chose to start your game in. There may also be a file called Slot....._BackUp.msv for any of these slots. If you have issues with one of the save files you can edit the back up (this file can be manually renamed by removing the "_BackUp" part of the name) and your device should then read it as a normal save game file, restoring your old save.
If you are logged in to Google Play Games and have previously uploaded your saves to the cloud then you will have a backup on the cloud. The uploading of a saved game to the cloud is a manual process to allow you to manage your online and offline storage. Firstly make sure that you are signed in to Google Play Games and the slot that you had your save game in is empty (you can copy this save to another slot using the copy button) and then press the "Refresh" button on the bottom bar. An icon with a cloud and a downwards arrow should hopefully appear under the "New Game" button for the empty slot allowing you to download the save from the cloud. The save games in the cloud work in the same "Three Slot" system so you can store 3 saves and you must download into the slot you uploaded from.