Steinway & Sons interview questions

The Hr reached out to me through an Email enquiring about my availability for an virtual interview on March 28 and the interview took place on April 3rd. The interviewer was a Senior Continuous Improvement Engineer. The interview process went very smoothly and the interviewer was clearly impressed and we discussed potential pay, Housing assistance and transit allowances . He promised that they'd get back to me by April 14th . I did not hear back anything from them even after 5 follow up mails over a course of a month to the HR coordinator, I applied to this position through my university job portal and they have removed it today(7th April). The least professional thing they can do is to send me an rejection mail ;(