Ridiculous billing

I am in a state of shock and utter disapointment with the way my contract line is being billed. In December 2014 l had a bill of 1300 that l did not understand were it came from and l blocked my line till the 7th of February 2015, and to my horror this morning l owe Mtn 2500. How can this be because l didnt make any calls with this line .l called your *** and your consultant told me she launched a complaint and your billing team was supposed to get back to me. Up to now l havent received feedback and this ia very frustrating and this is going to negatively impact my credit record because of your unprofessional and selfish billing practices, l want to he reimbursed the amount of 800 that l paid you for my december bill and l will definitely not pay this 2500 wen l didnt use your services.<br> <br> l am greatly disappointed because l can account for the 105,149 and 480 not this ridiculous 2500.<br> <br> Disappointed Customer