I had my 8MB service upgraded to 24MB. Again, without being requested. I noticed my download speeds had increased dramatically so fortunately I have the opposite problem with downloads typically between 16- 17.5 MB

TT estimated speed for my line is 18MB so I'm quited satisfied.
You could post in the
TT Members Forum asking an OCE (Online Community Executive) for assistance. Best to start a new thread. They only work normal business hours and not at weekends. Be patient, they will get round to you!