Day data used instead of night surfer

I took out a LTE router contract last month with 10gb day data and 10gb night surfer. <br> <br> This morning(before 7am) I downloaded a couple of music albums and discovered all my day data was depleted. I then phoned the customer services number and they told me that in order to take advantage of the night surfer package, I need to turn off my router at midnight and turn it back on again. I was appalled and shocked to hear this! I then asked to provide me this clause in my Terms and Conditions and the Telkom employee was unable to do so. I also asked for this data to be refunded and was also told no. I then asked to speak to a manager and she told me one will phone me back. Its been 2 hours now. <br> <br> This is a clear breach of contract ans misselling. Can anyone please give me more clarity regarding this?