Bad bad bad

On January 7 i made an EFT paying of R1014.00. On February 7 i received a sms from Dstv Multichoice that i owed an amount of R2031.00. On Friday February 28 another amount of R3175.72 were send to me. Today i received a sms with the amount of R2056.72. What's going on. Please tell me.