Poor service and connection

For the past week, even though my router has almost full signal, the data connection is either extremely poor or there is no data. (even thpugh the connection bars are almost full) I work from home and this has a HUGE impact on my work performance. I have double checked with another device and the same problem is present, there is signal, just no data going through, or there is extreme jitter. I previously logged the same issue, ref# ***. This is exactly the same issue again. This, along with the poor feedback, makes me think that Vodacom does not care about the single customer.