Dear Samsung Member,
Greetings from Samsung Customer Support!
We are sorry you've had to deal with this. Thank you for remaining so positive and putting your trust in Samsung. Please be informed that the latest software version Android Q (10) will being currently updating in April 2020 for your device Galaxy A70.
Steps for Update device software via FOTA: - Settings > Software update > Download and install > Software update available > Tap on Download > Install now.
If you're experiencing unusual behavior on Samsung mobiles, you can send us an error report or ask us a question in the Samsung Members app. This allows us to take a closer look at what is happening. (Samsung member > Get help > Send feedback > Ask Question/ Error report ).
Thank you for writing to Samsung.
Samsung Customer Support