Telkom Sales dropping the ball!

I have received an SMS as well as 6 e-mails from Telkom offering me an upgrade on my existing mobile data contract. I would like to upgrade my existing contract with Telkom as I received good technical service over the past two years and I feel no need to change, so I called 10213 Telkom Sales as per the SMS and e-mails. First call, I was on hold for 16 minutes before I hung up. Second call I gave up after 14 minutes. Is there anybody actually answering calls from paying customers at Telkom Sales?