Telkom Call Centre not prudent

Good day, I am so annoyed with the service i receive and sincerely need someone to take action and assist me with my problems. I refer you to the correspondence on Hello Peter dated 25/12/2015. In January I was informed that the 50gig data is open for usage and a password was forward to me via sms but due to Internet problems at the Exchange I was unable to use the internet and refer you to my note on Hello Peter dated 26/01/2016. In January when i received my billing account dated 21/01/2016 I was billed for SoftCap (20GB) I NEVER USED THIS 20 gig DATA AND IT WAS NOT ACTIVATED!!...then i was billed for SoftCap (50GB) 24 Dec 15 - 20 Jan 16, I NEVER USED THIS DATA AS IT WAS ONLY ACTIVATED FOR MY USAGE 25/01/2016 and I am still billed for the 10gig data! On the 28th January I called the Billing department and explained there is errors on my account a dispute was logged ref ***4. I received my new account dated 23 February and the problem is persisting I called the billing department again ref ***9 and was informed that there was no dispute logged but i received an sms? Why is billing department not sorting out this problem there is credit due to me the amount R574.72