Have received multiple calls, no voicemail left and when I call the number it says the number has been disconnected. I have now blocked to avoid future calls.

The first time I received the call (from the above number), I asked where are you calling from? The person wouldn't tell me, and then I hung up. Three hours later, I received no answer, but could hear the rustling sound on the phone, so hung up again. The calls had become a constant nuisance everyday for the last 2 weeks, as we had to switch off our phone. Fortunately, I have a mobile phone.