Hola @davidvenero
I am very sorry to hear you experience the same issue.
I sincerely hope someone out there can help us. If only they put some usb-port and/or reset switch on the lamp.
I like you use only iOs devices - and I updated to firmware because the app told me to do so. I have a very bad “feeling” that this FW update bricked both our lamps. :-1 
I have tried the android “YeelightTool” with no avail via bluestacks on PC in hope I could get it in or out of “service mode”. However a lamp in service mode is apparantly blinking the upper lights.
My light seems so 100% bricked so response even in YeelightTool.
I think unless some yeelight engenieer can help us we have a extremely expensive brick.
What was / “is” your fw version?
See this as well : Ceiling pendant lamp the light did not turn on