Walmart Senior Manager II, Software Engineering interview questions

I applied for Senior Manager II, Software Engineering in Bentonville, AR. in HR words-You will be receiving an email from my coordinator to schedule the virtual interview for the Senior Manager II (on-site position). I believe the process will be 3 rounds: 1st with hiring manager, 2nd with his team (panel), and 3rd possibly with the VP. I cleared first round and they have scheduled 2nd round which was called off and they mentioned that they will reschedule. They asked for my avaialbility and i replied and there is no response from them. I sent a followup email once however there is no reply. I didnt expect such behaviour from reputed company HR . So , please be cautious.