Unauthorized billing after cancelation

I have been having network issues with rain and I contacted them via the app but they never got back to me till I canceled they immediately called. I told them I am tired of having poor customer care when I need help and I have a contract and no longer want to use them I changed networks. I was not supposed to be billed and my services will be cut the end of January now yesterday an amount of R319 was deducted I contacted support got the ticket number and I called to no avail instead I got two more ticket numbers. I am so frustrated and getting help is and always have been a nightmare. Here's the last ticket number I received please reverse my money I seriously need it:***4