I receive many unsolicited calls from this number. The caller hangs up immediately  when I answer the call personally and also hangs up as soon as my answer phone message comes on. I have a mobility disability which makes it difficult for me to get up and move to the phone and I get very frustrated when I do get to the phone only to find that it is this nuisance caller.How can I prevent this caller contacting my phone number??

I receive many unsolicited calls from this number. The caller hangs up immediately  when I answer the call personally and also hangs up as soon as my answer phone message comes on. I have a mobility disability which makes it difficult for me to get up and move to the phone and I get very frustrated when I do get to the phone only to find that it is this nuisance caller.
How can I prevent this caller contacting my phone number??