Bad service

Im so furious right now, i did an upgrade a week ago with Dstv the consultant did not tell me there is an amount i have to pay upfront now they blocked my viewing say i should have paid a pro rata for the upgrade to be active. Then why was i not told in the beggining. They told me they will deduct months end the whole amount. What is this nonsense now is this how clients are treated. Really this is bad service and unacceptable is not my fault so why cant they fix their mistake and let me view my channels in piece