Bad Customer Service and Bad Network

Yoooh people I'm so frustrated with Rain, it's been 3 weeks now I don't have internet connection but I'm paying and my account is up to date. I have enquired about this and the said they will assign a specialist to look on the matter but even today no one has contacted me to fix this. Worse part I have a small business that I'm running and we are also using this router as a family. The SIM 101 shows the network is 5G and when I run the speed test I get 138mbp but I cannot connect devices they all says connected without Internet