I am at nowhere situation (think before you join any company)

I had 2 offer and I rejected one very good company and I selected a pure startup company where they have only 1 website service based 10 People head count. They have taken me around 6 rounds of interview. I cleared all of them. They forced me to early relive from my current organization saying they pay buy out amount. After many rounds of discussion and completing my tasks and kt's my current organization agreed to relive me by taking remaining 50 days basic salary. In this period I have confirmed that what I kind of projects I will be working on and teck stack details and they have confirmed that tech stack will be what exactly I am working right now.

Today!!Only 1 day left to exit now I had a Conference call HR+ tech head and they saying I will be working on any technology based on the requirements. And when I told them that I have already confirmed about teck stack these people started telling me " what kind of developer you are?? You are not ready to explore things ?" Many things forcing me to accept that I will work on anything you assign. It was very rude call!!! I ended up crying saying I am getting hurt!! Because they were criticizing me and about my experience. Trust me this was worst call I ever had in my career experience where the tech lead guy with very bad way talking to me just bcz I said I don't want deviate technology.

I have decided to not to join this company anymore !!!

I hope you guys pr anyone who is reading this will take clear confirmation and understanding about the company before joining them and resigning current organization

Thanks