Jobsite security system nightmare

I purchased two jobsite security systems for two separate sites. What I thought would be a simple solution for connecting a remote system via cell service (since there is no wifi at the jobsites) turned out to be a horrible mess and hours of wasted time troubleshooting. First off, the customer service is abominable. Each time I would call to get tech support to walk me through the very convoluted setup between Ring and Eero, I would get different setup instructions. It has been over a month and I have burned through my free trial and I still do not have either of these systems set up. I have made numerous calls. The least they did for me was issue come credits to compensate me for the hassle. On the latest call, I was told that customer support is not trained on the jobsite system. I have gone through several failed attempts with customer support to connect the service. There apparently is no escalation dept. where senior techs are trained on this system that can help me. Short of having to pay to have it professionally installed by Ontec which I shouldn't have to do, I am completely lost. These are for temporary use. I am reaching out of frustration before I give up and return the systems. Any and all help appreciated.