Poor customer service

I am truly disappointed with the service from Vodacom, especially since I have been a faithful customer for around 25 years. I called the customer service number on 19th May and spoke to Dumisane , asking for a change in my contract because the minutes were too little and the data could be reduced as I use my home wi-fi. He quoted me R219.00 per month for 200minutes and 65mb data, but said that there might be a fee for migration, I told him to escalate this as I was not prepared to pay this additional fee, especially since this was not an option when I upgraded my contract. I received an sms with Service Request ***. On 20th May, I received another sms that the service request is being processed by Asanda Dlavana who will be in contact with me shortly. Asanda never called me and I got a case closed sms on 21st May. I then got notification that my migration has been successful and the new fee is R309 per month. I called again on 25th May and spoke to Selinah and explained everything again and this time demanded that someone calls me to confirm that the fee charged is much higher than what I given told by Dumisane. She sent me a Service request ***. Nobody called me back and the migration still took place. I called again two days ago and spoke to Mpho(not sure of accuracy of the name) who kept telling what the new package is, but didn't listen properly to my complaint. After putting me on hold and coming back to me she then said she was going to speak to the upgrades department and put me on hold only to end the call without responding. She never called me back either. This is terrible service from Vodacom, especially to a faithful customer.