What's the best thing to say to a company that won't stop calling you even though you've politely but firmly asked them to stop calling you previously?
Alternatively, what's my other options? Unfortunately their number doesn't show when they are calling (it doesn't show "withheld" it comes up "unknown" or something like that) so I don't know how else to stop their calls.
Just trying to contact my telephone provider to see if there's anything they can do, but they're a bit useless (Pipex)...