4 Meg line operating at 0.5meg speeds.

I have recently signed up for an Mweb account. I started on 4meg with the AGREEMENT that as soon as line migration happens, and showed concern when asked. I asked what the speed will be after throttled and was not told this. I will upgrade to 10Meg line. I was explained that there is a throttling policy, but with NO ISP EVER have I been throttled so badly for going 15 Gig over their \limit". After speaking to their \""Support\"""