Poor upload speeds and an unwilling Afrihost to resolve

After two months of to and fro with multiple call logs with Afrihost there seems to be no willingness to correctly identify and resolve the problem I am experiencing. I had contracted for many years a 10/2mbps line. The challenge being the upload speed only achieving less that 50% of throughput. Multiple complains and tests resulted in isolating the issue to the line (bypassing routers and trying all configurations possible) and it appears that there is inconsistent upload speeds. In desperation I upgraded the package to a 10/10 mbps line and now am only achieving approx 5mbps upload speeds. The download speeds are always consistent. This is hugely frustrating as the support engineers don't seem to be willing to address the issue. All they trained to to is ask for details and do port resets or ask you to reset your router. This is hugely frustrating especially when I have upgraded the line in order to improve quality on the line for video conferencing due to having to work from home during this COVID19 time. However this issue has been persistent for over 2 months prior to COVID19 and the issues still is not resolved.