DSTV ( Multichoice) is *****ing money from me

I have two dstv explora decoders on extra view compact package and this month of march i bought a standard decoder to add it as a 3rd extraview decoder but then dstv increased my subscription to the value of a premium package, I called dstv im getting no solution instead multichoice was trying to make excuses saying i disconnected my showmax account last month which is not true they cant give me answers and they expect me to pay a total of premium package by the 1st of april