Remember be nice when you deal with the isp but be persistent. If you dont get a straight answer from the CSR, ask to speak to someone on a higher level. Most CSR’s just read a script and seem to know nothing about the internet from a tech point of view…
Oh yeah you might want to scan the reviews of your provider as well, see if you can find anyone else that is saying they’re being throttled.
There are certain other things you can do, but this is your 1st step. If you have any more questions or need some advice feel free to drop me a note.