revolting service

i recently noticed that my bill was inflated to R993 FROM R409.I contacted the call centre and was transfered to the billing department and i explained to the lady and that i see on my statement that their are reversals done on my account wich i know nothing about and the lady sorted it out and i received an sms i need to pay R409.

today i received an sms that i need to pay R993 again and my viewing has been susbended .I paid my normal R409 and they say i have outstanding of R589.

i dont understand all this drama because ive been paying my dstv and ive never done revesals that im seing on my statement.