Zeeva International interview questions

It’s a quick 15 minutes zoom call with one of the founders of the company. First they called and confirmed that they would like to offer me the position & we will send offer letter today by EOD. It’s been one week, I didn’t get any response. I tried callling them, but they never picked. It’s quite disappointing. Even if they say they want to offer , don’t keep any hopes untill you join the company. They are unethical. You can see all reviews.