Is there really an annual DSTV payment discount?

I pay Multichoice annually to get a month's free DSTV subscription&better rates.On 24thAug2015 my DSTV was cut.Call centre(refs***4I6/***4I8) said it was due to an unpaid bill&my annual deal cancels& I am now billed to Dec2015 &must pay >R2000 to reconnect!I refused as last year when my DSTV was cut(also before the 12th \free"month was over)I settled the account&made an annual payment-according to the calculations of the teller.Clearly Multichoice won't offer me a year's DSTV without paying an old bill!If my account was in arrears it was due to errors by Multichoice.Call centre said service was cut 23rdSept2014 &payment was received for DSTV service upto Oct2015.The payment date was changed from the 1st to the 9th.So why cut my DSTV before those dates-twice!After multiple errors my \""unpaid bill\"" went from >R2000 to R740.32 to R345.33 to R0 before reconnection.Also I'm told there were errors in my bill since 2013.So MULTICHOICE"