Not very happy client

I took a cellphone contract with MTN in 2016. From 2016 i have been upgrading when my contact is due till now. Early this year i was contacted for an upgrade. I was then advised about a number on my profile which i have no knowledge of. I asked the consultant to cancel the number as i have one number only. Two month later i went to MTN branch in Raslow to inquire about the number. I was then advised that there is another number in my profile ( meaning now there is another number added on top of the number i didn't know ). I was advised that there are three numbers on my profile. I asked them to cancel those numbers. They told to get an affidavit and come back to report so the numbers can be deleted and investigated. When i return with the affidavit, they informed that they cant log the case as probably this are my numbers and i forgot about them. They then gave me a number to call so i can cancel the numbers. Been trying to call without assistance until yesterday when the call was answered. The consultant advised that i must speak to retention and i was transferred to retention. Retention consultant advised that the numbers are suspended she cant assist with cancellation. (The number are suspended but im being debited.) I was transferred back to customer care to unsuspend the number so they can be cancelled. Customer care consultant advised that she will need to log a call so the numbers can be resuspended and once that happened they will advise on the way forward. From 2016 till today, never missed any payment with MTN. Been paying for numbers that i have no knowledge of and no one is willing to explain how these numbers are added on my profile.