Zeiss rifle scope repair ???

I had issue will older zeiss scope model: Diavari ZA 2.5-10x52
It appears it will not hold POI any more, sometimes will move with adjustment,
sometimes not & caught it this weekend moving POI up to 6-7 inches, without
adjusting knobs.
In past I've used Swarovski & Leupold, both of those were stellar.
My question is how is Zeiss repair center to deal with?

I hear it takes a little while but they do good work.

They are easy to deal with. Nice people. Not sure what they will do for that old model optic.
Call them . Talk to Karen or Sonja.
Would like to hear your feedback on what they do for you.