DSTV inflating my price

We are using the family package which is R279.Last month i paid late and i had to pay 329 including the R50 reconnection fee which is fine by me. However this month my statement says i should pay R309 for the family package. My due date is only in 7 days so i dont know why my bill is inflated by R30 .I even paid extra of R20 last month.I know its not much but if they do this for many of their clients then it means they are making millions from inflating prices.DSTV please fix this!!!!!!