Called to my cell phone about carpet care; before they could finish i hung up

I answered the call and said 'hello' several times.  No response.  Heard background noise and then party hung up.

No message left

Voice machine for carpet care, when connected to live person and asked to be removed from phone list, they hung up

Received this "spam" call on my cell phone from Carpet Care, but under a different number, 201-257-6013. There was no option to be removed from their call list (as is legally required)so I pressed "1" to be connected for "an appointment."  When I began asking questions, the person hung up before I could say remove this number from your list. When I called back, I got a message "your international call can not be completed as dialed...." Appears they use different numbers because I see another complaint for Carpet Care under different number.