RSAWEB and inconsistent internet

I have been with RSAWEB for 2 years. My fibre is currently with Vumatel. I have had on and off internet for the last month. I have reported it via the chat as no one answers calls. It’s inconsistent so difficult to plan for and I work from home. To top it all they increased my premium by R69. So paying more and getting less. The frustrating thing is they always say there isn’t a problem. That I have to reset my router which I do of course. It doesn’t work. Some time in the day the internet is back. I even thought it was my company causing a problem. I need answers and clarity on where the problem is. I had this before when I was with them and Openserve. It works for a time then it’s problematic. I’m going to have to investigate other service providers.