Alpine Ridgeline mini split

Hello to all.

I am grabbing at straws here. I have installed an Alpine - Blueridge mini split. The unit itself heats and cools fine. The issue is their only options for a thermostat is pathetic. I installed their wired unit at about 60" right next to my Sinsi Touch (Excellent performance).

First, new out of the box, the temperature is off 6°. Verified by 4 known, separate thermometers. That was adjustable within their setup. Apline actually replaced it once but the second one was also off 6° as well.

After several months, the main issue is the differential is not adjustable in their setup.

It is around 2°+ degrees in each direction, 4°+ degree range. Heating, If you set the temperature at 70, the unit will not respond until below 68° and will not turn off until 72°.

At the moment, if I want to increase the temperature 1°, from 70° to 71°, I have to set the temp to 72° to reposition the deferential then back it down to 71°.

I could write another whole page it this thermostats inadequacies but the dream is to correct the thermostat program logic or find a good alternative thermostat that works with this unit.

Thanks for looking and any help would be awesome.