Signal, but no service.

At least once a week for the last 8 weeks I will have FULL signal strength, but there will be no internet connection. This is not on a single device, but on all devices linking to the Vodacom networj. This has a tremendous impact on my work as I work from home. This is also not the first time that I have complained about this. I have logged at leadt two complaints about this in the past, and there has been numerous times that I have not complained. However, I am fed-up with the poor service from this provider.