Getting 9 Mbps on a 150 Mbps conn.

I have the premier internet service and I've been getting real slow internet (9 Mbps D/L) since Monday. I reported the issue via online chat on Tuesday and after resetting the modem on Cox's end and me turning off and on everything the matter wasn't resolved. So a tech appointment was made for Thursday (7/28) from 1 to 3 and the tech didn't show up till 2.45 PM and I got on the chat again and was told they have sent a message to the tech and he/she will call me and there's still 15 mins left. Nobody reached out to me.

I got on the chat today and the rep told me the tech has left a note as me not reachable which is not true as I got permission to work from home and stayed home for this appointment. The next early appointment is tomorrow and still I'm stuck with 9 Mbps down.

I'm extremely frustrated at this point because I've to wait for a week before getting a tech to even look at the problem and also the fact that yesterday's appointment was written up as me not being home. What can I do to get this escalated? Will Cox follow up with the technician and also waive charges for this week or till whenever they fix the problem?

Specifics:

9 Mbs D/L tested on a wired connection on a N450 Modem/Router that I rent from Cox.

Speed tested on Speedtest, Fast and also Cox's own site (which in turns uses Ookla so the same as speedtest).