Nonsense mulitichoice agents

I have been having a decoder for tear and been paying R120 lately,I then ordered a compact plus decoder last week on the 13th Feb then on a call I told a consultant that I'm not cancelling anything and will continue with R110 the the other new one which is a price lock of R545. I paid R120 in the 2nd feb and I paid again R180 over the weekend and now I'm suppose to pay another R131 of which I don't understand why am I paying all those amounts. I was told that I'm going to start paying for the new decoder on the 28th then the payment date for the other decoder of R120 was moved to the 28th also. Can this be fixed asap