COX communications

been having trouble with COX. just one issue is the speed. they say up to 100 mbds. the BEST i have ever got is 14. after talking for 1 hr to fix things. the next day at 10:30 PM i can only get 7-8 mbds. what did they do to me? my son says that speed is good enough to seen my drag race on ESPN3 on the internet. he says that the trouble is at ESPN3s side. but we have a change from business to privet issue that they just keep moving you from one person to another. if incompetence was a valve commodity they wouldnt need to be in the business they are in. AND they do NOT give a min speed.