Telkom ADSL

I have been a client of Telkom for over 8 years where I had signed up for a fixed line, including ADSL. At first, I was on a 20GB softcap internet and when their consultant called me with an uncapped offer on or about January 2019, I agreed to the deal. What that meant was that the upgrade [unlimited 4mps line internet] would then replace the 20GB package but to my surprise, I was charged for both packages on the same service number whereas the one [20GB softcap] should have been replaced by the upgrade. I called Telkom's contact centre multiple times and each time I was informed the softcap would be cancelled and the amount charged credited. Eventually, the softcap package was cancelled but the amount that was charged on the monthly invoice up to when the package was eventually cancelled was never credited back to me. This is frustrating as all along I have been paying for a duplicated service. It meant I had both the 20GB softcap and the uncapped package on the same line.