You would have had the same problem if it were Bell or anyone else. You were not on a 3mbit profile when you got download speeds of 3800k... just not possible. Perhaps a trouble ticket was submitted and your line was fixed without entering your house. I'm not sure you will find out the real answer, but it wasn't fixed by just bumping you to 6mbit. By 6mb you must be on business or the max should be 5mbit.
At least you are running with good speeds now. Cheers.
