With the propellers off of your drone, try the following:
Connect your drone to QGroundControl, once you are connected to it, go to the Flight Tab (tab where you monitor the flight). On the top, it should show the flight mode it is in (if what you state is correct, this should display Acro). When you click on it, a dropdown menu will show up, and you can select a different flight mode, try “Stabilize”.
If you are able to do this, and the flight mode changes, your issue is with your RC Controller.
Let me know how this test goes.