Got clashing IIM interview calls, what to do? Do IIMs not communicate and plan it up?

I had received IIM Calcutta interview call for 17th February at Hyderabad location and I received that email on 6th January. Today I got IIM Lucknow interview call details and it is also happening on 17th February at Bengaluru location(I currently live in Bengaluru). I emailed IIM Lucknow to reschedule but they emailed back saying that they "may consider" rescheduling the dates to Lucknow between 10-12th April but there's no guarantee of it and they'll decide and send notification further in March. This is incredibly frustrating as people work really hard to get these calls and now because of lack of communication between business schools(oh the irony!), I may not even get to interview at IIM Lucknow. Any idea what to do regarding this?