They keep calling my Place of Business and hanging up after we say who it is. This happens frequently. Anyone know who it is?!

This number had called my business and hung up.  When I tried to call back,  I get a recording "thank you for calling our Customer Sales Center all representatives are currently busy please hold and we will be with you shortly" they never answer

(713) 766-9997  -  they persist in calling me time and again.  When I answe the phone, they do not say a word and hang up within 5-10 seconds.  So I call them back, again and again.  They are some type of telemarketing firm pushing wireless home security.  I tell them to remove my number from their list, but I still get the calls.

This number calls me several times per day. Everytime I answer there is nobody there. If I don't answer, they don't leave a message. It's bordering on ridiculous.