Cox's Internet keeps dropping, poor service

I have the service Cox High-Speed Internet - Premier Package and lately it has been horrible, really poor. I work as a technical translator, I interpret video conferences for Law firms, Engineering meetings, Medical Congresses and so on live. I pay a lot for that service and it doesn't matter that I have high speed internet if it keeps dropping every 5, 10 minutes, it's been happening in the last 2 weeks. It's outrageous, unlawful and unfair. I need a fast connection and I have that but I keep losing that fast connection while I'm working it so it's just useless. I was in the middle of an important meeting yesterday and embarrassed myself by keep getting disconnected. Cox is hurting my work and hurting me financially. When I watch Amazon movies I keep getting disconnected too. I used to have a very good ethernet cable and I thought maybe that was the problem. I bought a better one and the problem continued. I keep getting disconnected when the laptop is standing still on my desk. Don't bother sending me me that Fixing Internet Connection Problems link. I have done all that. I have unplugged the modem, then plugged it back in, restarted all Internet connections, refreshed my computer's Internet signal MANY TIMES. I'm not going to spend $10 dollars to talk to Technical Support over the phone, that's ridiculous. And I will not pay for service call when the technical issue was not caused by me. When the technician first installed it I didn't have any problems, nothing has changed in my residence, why should I pay it that is probably a Cox's issue??? That's just absurd. People in my family have had visits of Cox's technicians who simply didn't know what they were doing. If you send a technician to my place, make sure the person is knowledgeable about internet connections.  I refuse to pay for a service when the issue was not caused by me. I already pay too much for a service that doesn't work properly. When I use wifi it curiously doesn't drop but I can't use wife for my work.

I'm a very disappointed and frustrated Cox's customer right now. I need this to be fixed.