Internet keeps dropping

Hello, 

Problem -- internet cuts out at seemingly random intervals.

Equipment -- Arris G36

Work done so far -- Three tech appointments have not solved this issue yet. The techs have run new line, checked signal at the box located by the street. 

I have been able to pull this graph from my gateway to indicate signal (?):

I am unable to watch the streaming services I pay for with any sort of reliability. 

Please advise, this is absurd.