My storm ready

I got my storm ready a few yrs ago because one of Comcast people told me it would be perfect for allowing the internet to make it out to my trailer and it worked great until Comcast said I needed an updated modem and storm ready now it won't connect so im back to service that works off and on but mostly off and every time I've called and complained I was told they didn't understand or that it was fixed even took the modem back and storm ready and exchanged them again n then the last person I talked with told me she had someone coming out the next day but no one came besides they don't know how to work on the storm ready or so i was told now they are telling me if I return it t by ey will stop charging me for it instead of finding out why it won't connect and fixing the problem but if im going to return it I might as well return the modem abd find me a new provider cause it's obvious they don't value me as a platinum customer or whatever it's just talk