I purchased a Eachine Turbine QX70, (BNF). This is for DSM2/DSMX receiver. When I tried to connect to Betaflight or Cleanflight, it did not even load. Have to connect to one or the other in order to put it into bind mode. Can anyone help with this issue. Please and Thanks.

Hello RCGoups.
I am very new to the Hobby. The issue that I'm having is that when I move throttle stick to 20% motors start to rev-up and continue to rev-up. If I bring the throttle stick down the motor speed come down. When I push throttle stick more than 50% the motors will rev-up and not slow down they will continue to full power. Even if I pull the throttle stick down. I tried turning my transmitter off to see if failsafe would cut the motors. It did not. I had to disarm it. I could arm and disarm the multi-rotor no problem. I heard that you have to have the props on. So I put the props on and tried to do a hover in house. Got the Wizard in the air, but the issues are the same. With or without props it has the same issue.
This is what I'm working with. I have a Eachine Wizard X220, using an AR7700 receiver, with the Spektrum DX6i transmitter. I really could use some help here.
THANKS in advance.