I am 66 and had the same problem. A couple of weeks ago, after posting on here, was advised to look in my phone 'handbook' and I noticed that I could block up to 30 numbers, I followed simple instructions and did same, I haven't had a nuisance phone call since!!! I have a Panasonic KX-TG8051E model, but i'm sure there'll be other makes and models out there with same facilities. Its worth investing in a new phone handset if its going to stop the calls. Trust me, it works. :)