Say nothing and put the phone down.
If that don't work, pick the phone up, leave it on the side for a bit while you get on with stuff.
Or ask them for several forms of ID just so that you're sure they are who they say they are.
That reminds me, I guess I could speak my own version of German to these people.actually had one last week who said the couldnt understand my accent
True but if they are speaking poor English or speaking too fast then I have no time for themThese calls are a nuisance, but remember that the callers are only doing a job, and it's not a job most people would envy.
There's no need to be rude or offensive to them, just tell them firmly and politely that you don't want whatever it is they're selling. If they persist, just tell them you will hang up, and do so.
TPF. Not had a marketing call in 10 years.