Nuisance calls are very annoying and intrusive. My old mobile phone was bombarded with them. As only a few people knew my number, it was easy to not answer unknown numbers. I also got texted by Hermes, a courier firm, about some parcel left in the north of England several times a day. After complaining by email, the texts stopped for a couple of weeks, then restarted. I bought my new phone sooner than intended and did not keep my old number. Those texts are now going into Internet ether!
We were cold called by Anglian windows regularly. I tended to be rude saying if we needed new windows they would be the last company we would consider. I think my DHs answer was better. He inquired whether they could double glaze his car!