No Customer Billing Support

5G Service has been great for the last 2 years, but we recently moved to another area that does not have 5G coverage. I contacted Rain and downgraded my line to a 30Mbs from the 200Mbs line since I still get 30Mbs on their 4G fai*****. They billed the the correct R599 for one month, then upgraded my account back to a R999 package since October last year without my consent. I have been trying to contact them for the last 3 months to correct this, but their billing is either offline or they ask you to hold and never come back to you. I have also left various requests for them to call me back, but they never do. I even cancelled my one 4G sim to prompt a callback from an agent, but still waiting.