Wifi always not working

I have been struggling the while week to get my wifi to work, i was told it will take 72 hours for a technician to call even now i still cant use the wifi but i have paid them, they are unprofessional, i took to facebook i was told that my account is active and another one called to say its not there is a fault with my line, how difficult it is to fix this? Its been more then a week now, im gonna cancel this as its useless