Continuous brief loss of interent/wifi the last few months

We keep experiencing loss of internet/wif that could last anywhere from 2min to 30min.  I noticed once yesterday the cable also went out during this time.  Over the last couple of years we have constantly dealt with slow internet (though we pay for one of the top tiers) cable delays/freezing, and every couple of months we're dealing with outages.  I have noticed multiple times on my app that there are technicians in the area working and although I've signed up for text alerts about these sort of disturbances, I never receive any alerts.  I've tried calling for a tech in the past, but I'm warned of a $100 fee if nothing in my home is actually wrong or broken.  And I'm not willing to pay that fee especially when we're paying $200/month already and not receiving consistent service.  Has anyone else dealt with something similar and have any suggestions of how we could fix our outage issues?  My husband and I both work from home so having reliable internet is pretty important for us.  We have restarted our modem multiple times, checked connections, etc to be sure those aren't the issue.