Unknown number

I absolutely avoid private or unknown numbers on my mobile these days due to there are far too many people wanting to sell you something. As soon as you answer you can hear the din of the call centre behind you and then the person says in the most rehearsed voice "Good day mam how are you today?" By now I have heard enough. That person is really not keen on hearing how I am and is anxious to get to the next thing on the script. I often say that I am at work and ask them to please call me after 6pm to which they usually get so gobsmacked as their shift ends at five. Mind you I have had some call me back after 6pm as a follow through. Here is how todays went as I was a little bored(dont tell my mum I used that word-oops mum you might be reading this)

Me: Hello

Call centre: Hello mam its Kaveshni from Cell C calling

Me:I am at work at the moment-please can you call me back after 6pm

Call centre: Can I call you at 5pm?

Me:I am working till 6pm so 5pm will not be suitable

Call centre: What time can I call you tomorrow-what is most suitable?

Me: After 6pm daily however if you are selling something I am not interested(said in a sweet tone)

Call Centre: But mam I am going to be selling you a package on a better call rate ("Greater call rates"-made me think of that line from the Indian Xmas jingle on You tube) What is your name?

Me: You should know my name as you called me

Call centre: Mam your number is selected from a system and no names are available
(I was thinking "I am way more than a number" LOL)

Me: I am so sorry but I wont be taking the package

Call centre: Okay thank you

I feel really bad that these people have people putting the phone down on them and getting irritated are trying their absolute best and this is their means of making a living but come on receiving these calls gets a bit much when you have so many providers calling you.