Barraiser Software Developer (Frontend) interview questions

3 Rounds taken via barraiser only. After I cleared all the rounds they said feedbacks are positive and they will be extending an offer. Then they called to tell that they are offering 25% less than the expectations I told before even starting the interview. I told that before even starting we agreed what I am expecting, then they said you are not even selected and feedback is negative. I can safely say I wasted my time with these guys