Change of bluecard from 18b to 18g

Hello team,

I have been living in germany since 2019 august and currently having bluecard since 27months wherein i am eligible for PR and have all other documents like A1 certificate etc..,

Now that when i applied for Pr process officer said that i have bluecard with 18b not with 18g as i was converted in august 2023 .

As she is asking me to provide B1 certificate not the A1 for the PR.

I have seen similar case in our community group and mailed her back with same info but she asked me to extend the bluecard .

How can i proceed further and provide me some suggestions to explai her to process my PR.

I have also scheduled a call with counsil what should i need to clarify with them before my visa appointment