Upgrade harassment

Goodday, This is the 4th time I am complaining about the daily phone calls I receive to tell me I am due for an upgrade. I AM AWARE I AM DUE, as I mentioned every single time. I as the client will decide when I am ready to upgrade. I already blocked MTN on my cell phone to stop being harassed daily. Now they are starting to call me at my place of work, this is not just ********* but ******* to give out my details to anyone!!! I am going to file a complaint with ICASA and I will also be reporting you to the Popi act as my data should be safeguarded by MTN SA and it seems that you just share my personal information with anyone.