Frustrated

Dstv upgraded a wrong decoder yesterday via wats up, when, I called in today to tell them they upgraded the wrong decoder please downgrade it and upgrade the right one and am told I must wait for the 15 as it is my scheduled date and it will only be downgraded then ,how can I pay R400 for nothing that decoder they upgraded it's not working we not using it I am so trusted and dint have the money to pay for that decoder Dstv please solve my issue my no.***