I don't have one

<p>I bought a WiFi from Telkom 2 months ago .was promised to get sms's 1GBT of data and unlimited what's app i would pay R150.00 i was not told of any hidden cost this month i was debited R690.00 which i don't know what's that for .What makes me angry is nothing was told to me about hidden cost when i sold the Wi-Fi to me i was not going to take something i don't afford please assist me </p>