Constant harassment

I am constantly harassed with calls from Absa to upgrade my account, take out insurance, increase my credit limit, activate rewards, ect.. Today i was called twice to upgrade my account. I have been contacted by Absa at least three times already to upgrade my account. Every time I ask them NOT to call me again. I was beyond furious when i received a call for the second time today, for the same thing. After AGAIN asking them not to call me about that matter. If I didn't have so much activity on my account and credit to pay off, I would seriously consider switching banks. It really feels like they want to milk every cent from you that they can.