Are the speed drops constant all day or only at peak times?
For myself the speed drops almost felt random, for example I tried @ 1-2am and was still stuck @ 2-3mbps on speedtest and torrents without a vpn.
peak times its feels normal to see an almost 30-50% drop at times especially 6-9pm zones well in my area at least before all my issues.
Well. Knowing VM, can be months/years to fix!
Yeah I read some guys on VM forums had been waiting 6 months for his utilization issue to be fixed but its sometimes a mine field on their forums a great deal of people seem to complain they are fed up of the lieing from vm it is also possible the customers fault though !