Add databundels that is not asked for

In Feb 2016 I upgraded R199 contracts, including phones. However on the 6th of March I received my new bill for a cool R1695.10. I immediately logged a call and was told that it is a mistake, as two databundles were added to my account, which I did not ask for or agreed to, as I never even use op my data of my normal contract. I was told that it will be rectified. In the next few weeks up until the end of March I followed up on this call and was told that it is with the people that must correct this. However on the 31 of March the amount was deducted from my account. Again I called and asked what is being done. I was told that I will be refunded as soon as my account is rectified. I had the charges reversed on the 2nd of April, hoping that it will get them to do something about it. Then I paid the amount owing, which is R612. However, when the new invoices became available, again the bill for end of April was again more than a thousand rand. Again I was told that I will be refunded. Then on the 15th, the 'outstanding' R1083.10 was added to the end of April amount and deducted from my account. i reversed the charges again. Then on 18 Apr my service was interrupted! Nice!!