Hi ive upgrade my mtn contract 2 years ago to a double deal of R399 a month but the mtn sales person who helped me with the contract made 2 different contracts on my name without me knowing shes made a mistake coz i ask to sign for both phobe but on seper

Hi ive upgrade my mtn contract 2 years ago to a double deal of R399 a month but the mtn sales person who helped me with the contract made 2 different contracts on my name without me knowing shes made a mistake coz i ask to sign for both phobe but on seperate days ans i ask why am i signing again and i was told just to confirm i got both phone and from the brginning ive been fighting with them now i jave a big bill that i didnt apply for.