I never answer my mobile phone unless I recognise the number. I rarely give my number out, just family and close friends. I get a lot of calls from scam numbers, which I check on the internet. I was pestered with texts from a well known parcel delivery company about some parcel to be collected 300 miles from here. Nothing to do with me. After ignoring them for a while, I emailed a strongly worded message. No apology was forthcoming, but the texts have stopped.