Faulty Wifi & Bad Customer Service

We got uncapped WIFI this year through NEOTEL and it has been nothing short than a nightmare. The Wi-Fi does not work 80 % of the time. When one phones the customer care line they pretend not to hear you and put the phone down and if you do speak to someone and after explaining everything and the phone cuts out they don't phone you back despite them knowing who you are. We are used to the troubleshooting that we now know what to do before we phone. Yesterday I requested that someone please phone me back in the evening when I was at home to deal with the Wi-Fi, no one phoned back! I was also advised that it could cost R 800 for a technician to come out. Why must I pay that when it has been faulty from the start?? I ended up the night before a Unisa exam using a Cell C and Vodacom Hot spot because the Wi-Fi was not working AGAIN! I feel that NEOTEL should reimburse me for the data that I had to use for the hot spot and NEOTEL must reimburse me for three months subscription and come and collect their equipment. Why must I pay for something that is not working 80% of the time ??