Hello Vbanlao,
I hear you that this has been a frustrating experience. We absolutely want to be sure we're exhausting all possible steps to ascertain the cause a service issue. It appears after several appointments over the last couple months, many things have been done and tested to find that the issue that remains and impacting your connection is congestion.
Outside of congestion or utilization issues, this is not something we would schedule a service technician to your home to resolve, but is something maintenance plans and works on to address in your area. There has been a significant increase to the number of people working from home during these uncertain times. Cox has been and continues working on ways to improve issues with congestion and utilization issues. Congestion and Utilization issues is taken seriously, but takes time (several weeks to months) to gather a solution.
We want to keep you connected, and I can imagine this has been difficult for you to work through. If you need assistance with making changes to your account, please contact us for help at Cox.Help@cox.com with your complete address, and first and last name, and include the link in the address bar for this forums thread.
Dustin
Cox Forum Support Moderator