Poor Customer Service from Cell C

I have just experienced shocking service from the call center. I migrated my contract to INCREASE Airtime minutes and data, Cell C gets more money. This was done on 24 October, but to date has not been activated. I spent over 30 minutes with 3 different agents. 2 from Customer Service - who kept telling me I did not migrate. then when they actually listened to me and took the time to check they saw I had actually migrated but it was not activated the first lady told me to dial #33*1234# and restart my phone. I did that and it did not work so I called customer service again, explained the whole story twice as the lady was not listening the first time, made me explain everything again and then argued with me and was quite rude and arrogant. She eventually took the time to check and confirmed I was of course correct about what I know. She then said customer care could not assist and transferred me to Upgrades as she said they were the only ones who could activate the migration. Upgrades said they could not (after I repeated the whole story again - 4th time) and said I need to speak to customer care. They transferred me and then I got a message to say the service is not available and I was cut off. I have been a customer of Cell C for many years and have 5 contracts with them. I am seriously considering moving to another service provider after this shocking customer service experience.