Tune

Hello I hope all is well I’m new the group and fairly new to drones. I purchased a supposedly heavy lift drone from sky technologies and what a disaster, problems after problems I reached and got no help so I’m reaching out on here. I want to know is there a way to tune my drone so I can do the auto tune and not fail I tried it yesterday and it failed so here’s what I’m working with.
ZD 850 hexacopter
Steadi drone motors 400kv
Carbon fiber props 15x5.5 I don’t know if they have been balanced or not I bought them off Amazon.
Cube orange
Herelink v1
Battery 6s 9000mah zeee.
Any help will do and thanks

If someone is within 150 miles radius of Savannah Georgia and want to do this for I’ll pay