Slower than expected speeds on Ultimate tier

I just recently got on the ultimate tier and am getting slower than expected download speeds. I remember testing it out when I initially got it and was getting around 200 - 275 Mbps however these past few days I've noticed my download speed has been slower than usual. After testing it seems to hover around 80 - 100 Mbps. When looking at my account I also notice that the status of my internet is "Service Interrupted". Upload speeds have been consistently hitting 30 Mbps so there's no issue there. My modem is a Motorola MB8600. Any help would be greatly appreciated.