Loss of vertical control

After 3 days to get the new firmware organised and get it flying, it went well.

But it has contracted some disease leaving it with insane vertical control issues that are deteriorating.

After take off, it hops up and down while hovering and then, without any input, has insane vertical take offs (usually into a tree branch) and does not respond well to control inputs to come back down.

Now the owner of a cracked lens. Anybody selling replacement a lens kit?