Mtn shop- westgate mall

I recently bought a home wifi @ Mtn westgate mall, the consultant never cared to explain how it works worse she gave it to me & said it's a plug & go wheras she didn't fix the settings, went back Many times with no help, until the one guy did the settings right. Yesterday I went back again as I had no connection again the consultant said its because I've used my fair usage given to me. How coz I'm on uncapped ? She failed 2 explain/ assist. Please Mtn train your people, it's frustrating 2 drive 2 a place & find such consultants.