Slow internet in the Florida Panhandle

Over the past couple of months my internet has been so slow at times that I cant connect to anything. This is an issue I have never had, until now. I have lived in the same place for 13 years and had Cox as my provider for over 30 years. So what is going on?? I noticed my internet price increased last month by $10 but yet my service has decreased to the point its not accessible at many times.  Does anyone have any idea what is going on? Thanks!