Simple accurate network monitoring tool with alert feature.

I am looking for a very basic network testing tool/app that will accurately monitor and then send me an email or a text every time my network goes down.  

It's for a home network, often I am not there, so I will be unaware that there has been a brief outage, I have been working with my broadband supplier and also a local IT repair company to get to the bottom of an ongoing intermitting issue over the past 2 months..

I want to run two ongoing tests, one on my WiFi and one on my wired/RJ45 network, both of which originate from the same broadband supply.

I know that three are very elaborate network monitoring tools, but I just need something accurate and basic with an alert feature.