Client Wants Free Fixes After I Installed Their IKEA Kitchen Shelving - Am I Wrong?

So I'm on this job installing IKEA kitchen shelving for a client, and everything goes smooth with the Allen wrenches and cam locks, but now she's texting me nonstop about how the doors don't align perfectly and wants me to come back for free tweaks. I mean, I quoted it as a flat install and we even walked through it together at the end, but she's acting like it's my fault the cabinets shifted a hair during settling. Saw a similar rant in the Handyman Nation Facebook group last week where the guy just blocked the client, but I'm trying to build reviews here. Anyone dealt with picky remodel types like this? Tommy Mello has some videos on handling demanding homeowners, but damn, it's testing my patience already. NGL, part of me wants to charge a service call fee next time.