Slow internet

I am extremely dissatisfied with the quality of service I have received throughout December. My internet connection has been consistently slow, making it impossible to stream movies or play videos without constant buffering.

I have reported this issue multiple times, but instead of a permanent solution, I keep receiving messages stating that the service is down. This has been ongoing with no improvement.

I am paying for a service that I am not receiving, and I expect this matter to be resolved urgently. Please advise on a permanent fix the poor service experience