PMI COACHES PVT LTD Reviews

I went for interview on 06-02-2021, interviewer told me that my joining date will be 18-02-2021, however Hr. Associate (Anish) has not shared the offer letter yet. I am trying to contact him but he was not responding to my calls. I have sent an email as well for the same. still I haven't recieved any confirmation. Please advise do I need to visit for offer letter.