Rain 5G POOR SERVICE and netwoork

I have been experiencing a very poor service for the past 2 months. My 5G is very slow and it's becoming so inconvenient because the issue is now permanent. I don't know what to do about it, since no one replies to you when you contact their support service. This is so annoying as the 5G plan is not that cheap; maybe i'm just waisting my money now and I should consider a different provider.