Enough of the harassment already!

Please STOP calling me to change/update/upgrade my mtn contract!!! I've clearly stated on numerous occasions that i'll contact mtn when i'm good and ready to make changes to my contract. Ive been a loyal customer for over 10 years and have already cancelled two data contracts mainly due to being fed up of the badgering to upgrade the contracts (both were due for upgrade but i chose not to do so at the time as i was waiting for specific handsets to be released). Please stop giving out my information to telemarketers that phone me at random times during the day!!!