Amobia bad service

I was a customer with Amobia prior to moving in 2019. I was told by Amobia that I couldn't get reception at the new place that I was moving to so I moved to a new ISP. As soon as I met my neighbours at the new place I moved into I found out that they were with Amobia. This was kind of frustrating because I had to pay for an antenna at the new ISP. When you sign up with amobia you pay a big installation fee for an antenna that belongs to amobia. Now I want to move back to Amobia because my current ISP goes down when there is load shedding. I've talked to Amobia about doing this but they want me to pay an instalation fee again, which is ridiculous because if they gave me the right information from the start then I would have never moved from Amobia and then they would have just moved my connection to my new address. I've talked to Darrel at amobia to try sort this out (to get my connection up and running again without paying the stupid install fee again) and they came to do a site inspection end of last year, I've phoned to follow up and emailed but just they ignore me. I'm not sure what to do next. Amobia is the only ISP in my area that allows the internet to stay on even during load shedding so even though they have bad service I kinda have to move back to them. Please help me. Thanks