MTN is messing up my credit record

in April i upgraded my contract bt two weeks later i had accumilated R4688 which i was told was via data Boitumelo was the guy who helped wit the upgrade bt wen i went to enquire he told me he will log a quiry bt has neva call me wit feedback so my services got suspended n i went to head office were they told me to make arrangement of payment in order to get my services bk then was told to go to the store manager bt nw the manager Steven told me he will also log a quiry then will call bt till today i had to call for follow ups n everytime i called Steven was on leave n no one knew wen he will be bk or anything abt my quiry so i went to head office again to complain that was after i sent an email to complains dept bt these no response till today spoke ro Gordan n he said he will fix things bt his no. keeps putting me on voice mail n hes nt responding to the eMail so now the amount is R6900 n i dnt knw wat is happening coz mtn staff is full of empty promises n is messing up my credit record