No messages left - blocked

Has called twice in the last 2 days.
No message left.

they wanted to speak to my husband. I said can I say who's calling... sorry for privacy reasons I can't say. I said this is my mobile phone and my husband only speaks to people at certain times.
I blocked the number!

Called, left no message. I called back but an automated message saying they are closed. Blocked number.

Called 4 times. No message left. Blocked the number now.

called and hung up

Called 4 times in 3 hours. Rang back number with an automated message to call back during business hours. Suspicious.

Called my mobile, a male asked by me by my first name then hung up.

No Message left

no message left