Sick of calls every day

For the last couple of weeks everyday I receive calls from Cell C.

I have 3 contracts with Cell C, I am not interested in taking out something new.

2 of my lines are due for an upgrade

*** has been due for an upgrade since ***0028 has been due for an upgrade since October

However I do not wish to upgrade as I have told many of the agents that called me I am not interested as Cell C does not have a phone that I want which is a Sony Xperia. I do not want to upgrade to a SIM only as when I do need a new phone I will then be forced to take a phone I am not happy with when I decide to upgrade.

I have actually blocked so many of the 021 285 number range such as:

************ Today I received a call from ***, decided to answer the call however I didn't get the agents name, I do not like being rude to Call Centre Agents as I am a trainer for South Africa's largest Contact Centre however I have had enough of the calls especially when I am working.

I tried explaining to the agent that I am not interested, in upgrading or taking out a new contract. She asked me to let her explain, I said ok please explain, she had a hell of an attitude and cut the call on me.

Pathetic service from a CCA.

Please can you investigate: number I was called on: ***.