How do I ask for higher line speed?

[#1]

My line speed is fixed at 1Mb. A couple of years ago, I think, I received an email from PlusNet about going as fast as my line would allow. I didn't want to change then, but I do now. How do I ask for higher speeds?

[#2]

raise a ticket asking to be put on MaxDSL probably here https://www.plus.net/wizard/?p=wizard&page=22884&wizard_id=38