Unhappy customer

I have a contract with telkom, took it through online, i was debited an amount of 399, january 2018, before even receiving the phone, feb when they debited double amount from my account, i inquired about the 399, i was told it will be sent back to my account in june, on the 21st of june 2017, i was doing a follow up, at first i was told their system cannot detect that i was debited that amount, after an hour a young lady which i forgot her name, did a follow up with the manager which i was told that my account was given to someone else or i was given someone else's account, they are sorting it out, within 24 to 72 hours it will be resolved, i was given this case number ********** 7 today when i followed it up, im told they are still on it. i am not happy, and my account they debit more than 400 but the agreement was 399,