Creepy guy keeps texting me what do I do?

I recently got the iPhone 5 so I was trying to create a message using Siri and then I accidentally sent a text to my husbands old number like 5 years ago number I still had it saved I meant to send it to his recent number and the message was good morning I love you have a nice day at work, I thought that maybe his old number was disconnected to it'll be ok but no some random guy replied saying who r u I said I apologise my husband had this number long time go i accidentally sent it to you my apologies, he replied back no problem, text me sometimes I'm a student you have good study and keeps text rubbish sounds like perverted a$$whole what do I do? How to block this number?

Have your husband text him lol thats what id do id tell my boyfriend to text him and scare the *** out of him.

Call your wireless carrier and have them block the number. Easy fix.

I think you have to call your phone company to block a number, so try that.

You might be able to block it yourself on line. I know you can with Verizon.

Either just ignore the texts or ask your service provider how to block a number that is harassing you (or reply to him that if he doesn't cease contacting you, you'll report him for harassment)…

This should be in Consumer Electronic>Cell Phones…

Either block his number, ignore him, or ask your husband to call him and tell him to stop…

I think the guy is just wanting to practice English it sounds like