Sorry, but p2p filtering, or as it is sometimes called "retaining quality of service", is common practise nowadays. There are many vendors of crap to do this task, such as Sandvine, Ellacoya, Redback, nCube (C-Cor) and who knows what else.
The only way to get out of this is to change ISP, and hope your new one does not employ such practices. Otherwise, your up- and downloads will most likely not exceed 10 kB/s anymore, in total, ever.