How to ask for credit?

Cox increased my Internet from 50Mbps to 150Mbps on 7/5/2022, and then increased my billing 8/5/2022 to a higher price.  I had not asked for the bandwidth increase, and being on a fixed income, I want to keep my cost minimal.

50Mbps was fine because I'm a senior.  My children and grandchildren attempted to help me reduce the circuit back to the original 50Mbps and lower my bill closer to what I was originally paying.  Attempts to reach customer service usually failed, or when I reached customer service, I needed to speak to another department that was always seemed to be closed. Customer service tried to help me downgrade the bandwidth and cost, but it wouldn't let them either. I was asked to call in again to a department that I couldn't leave messages.

On 4/4/2023, the website appears to have finally worked, and yet instead of getting the lower fee, again I was billed at the higher rates.  My son helped checked the status it says that they're waiting for documents.  I resubmitted 4/8/2023, and this time the order appears to have been completed.

On my son's rare visits, he usually only received 50Mbps on speedtest in this period.  My grandson had similar results.

I am a senior, and can only speak to customer service when my children and grandchildren come on the weekend to try to help me. I feel like Cox is taking advantage of me.