the sun roof will not open when i activate it

That could be true, have you checked your fuses & the switch?

Often the contacts on the switch go bad and it is the only problem. Remove switch and clean completely with electronic parts cleaner and reinstall. Gently depress switch in various corners and see if sun roof moves. If so, contacts are going bad and this may be only part in need of replacing. Check fuses as well.

If you're not doing the diagnosis and repair yourself , then for $1400.00 , I'd get a second diagnosis and if they come to the same conclusion then decide who you trust more to repair it right the first time. Hold them accountable for their diagnosis.