Slow internet speeds

I have recently upgraded my internet to the preferred package.  I have also upgraded my cable modem to a new motorola surfboard, my wireless router is a cisco that is rated at 50 mbps.  Since the uprgade I can only get around 1 mbps download speeds while my upload speeds are around 5 mbps.  Something is not right since they just upgraded in my neighborhood last week.  What can be done to fix this?  On a side note I did have 1 day where I had download speeds around 7 mbps but most of the time it is around 1.  That makes it almost impossible to watch something on netflix let alone have someone surfing the internet at the same time.  Thanks in advance!