Telkom's Bad Service

We have signed a 10Mb per second UNCAPPED Data contract at a specific price with Telkom. During the second week of December we had some trouble with the connection. My daughter phoned Telkom. According to the lady on the other side of the line, she had to reset the connection and we had to change our password. Fine. Then the lady said "I see you used a lot of data. I will have to degrade you to 4Mb per second instead of 10Mb per second". Now I would like to know if the lady understands the meaning of the word UNCAPPED. Does she understands the meaning of the word CONTRACT and does she understands that if one of the two parties involved in a contract, breaks the rules of the contract, then that person / company will loose its case in a court. Now getting down graded to less than ½ of what we have agreed on, will we pay less than ½ the end of December of our subscription fee? Can Telkom please explain to me how they do business? Can Telkom please explain to me what the word UNCAPPED means?