Before I share my sister's experience let me clarify something. Corporations do not care if the Institute you pursued MBA from is AICTE or UGC approved or not. They consider MBA degrees as diplomas and titles attached to the candidates for namesake only.
My sister wanted to become a professor at a university. In that light, she cleared NET and applied to DU. But they did not accept her as she did not have an MBA degree. They suggested she get one from a prestigious B School like IIM Ahmedabad. She right away changed her mind about becoming a university professor. So from her experience, we can derive the following conclusions
So look at other factors while considering if the high fees are worth it or not rather than the Institute’s accreditation.