Very bad service

I cant not believe the lack of service I have experience from Supersonic. I started the process of getting my internet up and running 4 weeks ago. My job relies on my being online, someone came to my house to install the router (without the additional extenders as requested). They “activated" the line and nothing happened. I have logged several calls and still nothing is being done about it. I still do not have internet. Every time I call, all I get it is someone saying the have escalated the problem. I am at the point where I am just going to cancel Supersonic and go with another ISP, this is completely ridiculous.