ADSL unusable during peak hours

I am aware of the official routes to lodge technical errors. However I have found that the Telkom social media desk is the only efficient route for dealing with problems.<br> <br> In the complex where I reside I am limited to a 4mb line. Now I am aware during times of peak demand my connection speed will decrease, however my line becomes unusable. Last night I recorded the download speed at 70 kbps. Most nights the download speed drops to around 1mbps.<br> <br> I have been in contact with my ISP, and I have been assured everything is fine on their side. Considering the cost I expect a certain consistency to my internet speed and usability. The problem seems to have only been exacerbated by the influx of students in Stellenbosch following the December break. <br> <br> Is Telkom able to improve my service? <br> <br> Thank you.